forum/skins/default/media/js/ui.datepicker.js

   1 /*
   2  * jQuery UI Datepicker 1.7.2
   3  *
   4  * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)
   5  * Dual licensed under the MIT (MIT-LICENSE.txt)
   6  * and GPL (GPL-LICENSE.txt) licenses.
   7  *
   8  * http://docs.jquery.com/UI/Datepicker
   9  *
  10  * Depends:
  11  *      ui.core.js
  12  */
  13
  14 (function($) { // hide the namespace
  15
  16 $.extend($.ui, { datepicker: { version: "1.7.2" } });
  17
  18 var PROP_NAME = 'datepicker';
  19
  20 /* Date picker manager.
  21    Use the singleton instance of this class, $.datepicker, to interact with the date picker.
  22    Settings for (groups of) date pickers are maintained in an instance object,
  23    allowing multiple different settings on the same page. */
  24
  25 function Datepicker() {
  26         this.debug = false; // Change this to true to start debugging
  27         this._curInst = null; // The current instance in use
  28         this._keyEvent = false; // If the last event was a key event
  29         this._disabledInputs = []; // List of date picker inputs that have been disabled
  30         this._datepickerShowing = false; // True if the popup picker is showing , false if not
  31         this._inDialog = false; // True if showing within a "dialog", false if not
  32         this._mainDivId = 'ui-datepicker-div'; // The ID of the main datepicker division
  33         this._inlineClass = 'ui-datepicker-inline'; // The name of the inline marker class
  34         this._appendClass = 'ui-datepicker-append'; // The name of the append marker class
  35         this._triggerClass = 'ui-datepicker-trigger'; // The name of the trigger marker class
  36         this._dialogClass = 'ui-datepicker-dialog'; // The name of the dialog marker class
  37         this._disableClass = 'ui-datepicker-disabled'; // The name of the disabled covering marker class
  38         this._unselectableClass = 'ui-datepicker-unselectable'; // The name of the unselectable cell marker class
  39         this._currentClass = 'ui-datepicker-current-day'; // The name of the current day marker class
  40         this._dayOverClass = 'ui-datepicker-days-cell-over'; // The name of the day hover marker class
  41         this.regional = []; // Available regional settings, indexed by language code
  42         this.regional[''] = { // Default regional settings
  43                 closeText: 'Done', // Display text for close link
  44                 prevText: 'Prev', // Display text for previous month link
  45                 nextText: 'Next', // Display text for next month link
  46                 currentText: 'Today', // Display text for current month link
  47                 monthNames: ['January','February','March','April','May','June',
  48                         'July','August','September','October','November','December'], // Names of months for drop-down and formatting
  49                 monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'], // For formatting
  50                 dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'], // For formatting
  51                 dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'], // For formatting
  52                 dayNamesMin: ['Su','Mo','Tu','We','Th','Fr','Sa'], // Column headings for days starting at Sunday
  53                 dateFormat: 'mm/dd/yy', // See format options on parseDate
  54                 firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...
  55                 isRTL: false // True if right-to-left language, false if left-to-right
  56         };
  57         this._defaults = { // Global defaults for all the date picker instances
  58                 showOn: 'focus', // 'focus' for popup on focus,
  59                         // 'button' for trigger button, or 'both' for either
  60                 showAnim: 'show', // Name of jQuery animation for popup
  61                 showOptions: {}, // Options for enhanced animations
  62                 defaultDate: null, // Used when field is blank: actual date,
  63                         // +/-number for offset from today, null for today
  64                 appendText: '', // Display text following the input box, e.g. showing the format
  65                 buttonText: '...', // Text for trigger button
  66                 buttonImage: '', // URL for trigger button image
  67                 buttonImageOnly: false, // True if the image appears alone, false if it appears on a button
  68                 hideIfNoPrevNext: false, // True to hide next/previous month links
  69                         // if not applicable, false to just disable them
  70                 navigationAsDateFormat: false, // True if date formatting applied to prev/today/next links
  71                 gotoCurrent: false, // True if today link goes back to current selection instead
  72                 changeMonth: false, // True if month can be selected directly, false if only prev/next
  73                 changeYear: false, // True if year can be selected directly, false if only prev/next
  74                 showMonthAfterYear: false, // True if the year select precedes month, false for month then year
  75                 yearRange: '-10:+10', // Range of years to display in drop-down,
  76                         // either relative to current year (-nn:+nn) or absolute (nnnn:nnnn)
  77                 showOtherMonths: false, // True to show dates in other months, false to leave blank
  78                 calculateWeek: this.iso8601Week, // How to calculate the week of the year,
  79                         // takes a Date and returns the number of the week for it
  80                 shortYearCutoff: '+10', // Short year values < this are in the current century,
  81                         // > this are in the previous century,
  82                         // string value starting with '+' for current year + value
  83                 minDate: null, // The earliest selectable date, or null for no limit
  84                 maxDate: null, // The latest selectable date, or null for no limit
  85                 duration: 'normal', // Duration of display/closure
  86                 beforeShowDay: null, // Function that takes a date and returns an array with
  87                         // [0] = true if selectable, false if not, [1] = custom CSS class name(s) or '',
  88                         // [2] = cell title (optional), e.g. $.datepicker.noWeekends
  89                 beforeShow: null, // Function that takes an input field and
  90                         // returns a set of custom settings for the date picker
  91                 onSelect: null, // Define a callback function when a date is selected
  92                 onChangeMonthYear: null, // Define a callback function when the month or year is changed
  93                 onClose: null, // Define a callback function when the datepicker is closed
  94                 numberOfMonths: 1, // Number of months to show at a time
  95                 showCurrentAtPos: 0, // The position in multipe months at which to show the current month (starting at 0)
  96                 stepMonths: 1, // Number of months to step back/forward
  97                 stepBigMonths: 12, // Number of months to step back/forward for the big links
  98                 altField: '', // Selector for an alternate field to store selected dates into
  99                 altFormat: '', // The date format to use for the alternate field
 100                 constrainInput: true, // The input is constrained by the current date format
 101                 showButtonPanel: false // True to show button panel, false to not show it
 102         };
 103         $.extend(this._defaults, this.regional['']);
 104         this.dpDiv = $('<div id="' + this._mainDivId + '" class="ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all ui-helper-hidden-accessible"></div>');
 105 }
 106
 107 $.extend(Datepicker.prototype, {
 108         /* Class name added to elements to indicate already configured with a date picker. */
 109         markerClassName: 'hasDatepicker',
 110
 111         /* Debug logging (if enabled). */
 112         log: function () {
 113                 if (this.debug)
 114                         console.log.apply('', arguments);
 115         },
 116
 117         /* Override the default settings for all instances of the date picker.
 118            @param  settings  object - the new settings to use as defaults (anonymous object)
 119            @return the manager object */
 120         setDefaults: function(settings) {
 121                 extendRemove(this._defaults, settings || {});
 122                 return this;
 123         },
 124
 125         /* Attach the date picker to a jQuery selection.
 126            @param  target    element - the target input field or division or span
 127            @param  settings  object - the new settings to use for this date picker instance (anonymous) */
 128         _attachDatepicker: function(target, settings) {
 129                 // check for settings on the control itself - in namespace 'date:'
 130                 var inlineSettings = null;
 131                 for (var attrName in this._defaults) {
 132                         var attrValue = target.getAttribute('date:' + attrName);
 133                         if (attrValue) {
 134                                 inlineSettings = inlineSettings || {};
 135                                 try {
 136                                         inlineSettings[attrName] = eval(attrValue);
 137                                 } catch (err) {
 138                                         inlineSettings[attrName] = attrValue;
 139                                 }
 140                         }
 141                 }
 142                 var nodeName = target.nodeName.toLowerCase();
 143                 var inline = (nodeName == 'div' || nodeName == 'span');
 144                 if (!target.id)
 145                         target.id = 'dp' + (++this.uuid);
 146                 var inst = this._newInst($(target), inline);
 147                 inst.settings = $.extend({}, settings || {}, inlineSettings || {});
 148                 if (nodeName == 'input') {
 149                         this._connectDatepicker(target, inst);
 150                 } else if (inline) {
 151                         this._inlineDatepicker(target, inst);
 152                 }
 153         },
 154
 155         /* Create a new instance object. */
 156         _newInst: function(target, inline) {
 157                 var id = target[0].id.replace(/([:\[\]\.])/g, '\\\\$1'); // escape jQuery meta chars
 158                 return {id: id, input: target, // associated target
 159                         selectedDay: 0, selectedMonth: 0, selectedYear: 0, // current selection
 160                         drawMonth: 0, drawYear: 0, // month being drawn
 161                         inline: inline, // is datepicker inline or not
 162                         dpDiv: (!inline ? this.dpDiv : // presentation div
 163                         $('<div class="' + this._inlineClass + ' ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all"></div>'))};
 164         },
 165
 166         /* Attach the date picker to an input field. */
 167         _connectDatepicker: function(target, inst) {
 168                 var input = $(target);
 169                 inst.append = $([]);
 170                 inst.trigger = $([]);
 171                 if (input.hasClass(this.markerClassName))
 172                         return;
 173                 var appendText = this._get(inst, 'appendText');
 174                 var isRTL = this._get(inst, 'isRTL');
 175                 if (appendText) {
 176                         inst.append = $('<span class="' + this._appendClass + '">' + appendText + '</span>');
 177                         input[isRTL ? 'before' : 'after'](inst.append);
 178                 }
 179                 var showOn = this._get(inst, 'showOn');
 180                 if (showOn == 'focus' || showOn == 'both') // pop-up date picker when in the marked field
 181                         input.focus(this._showDatepicker);
 182                 if (showOn == 'button' || showOn == 'both') { // pop-up date picker when button clicked
 183                         var buttonText = this._get(inst, 'buttonText');
 184                         var buttonImage = this._get(inst, 'buttonImage');
 185                         inst.trigger = $(this._get(inst, 'buttonImageOnly') ?
 186                                 $('<img/>').addClass(this._triggerClass).
 187                                         attr({ src: buttonImage, alt: buttonText, title: buttonText }) :
 188                                 $('<button type="button"></button>').addClass(this._triggerClass).
 189                                         html(buttonImage == '' ? buttonText : $('<img/>').attr(
 190                                         { src:buttonImage, alt:buttonText, title:buttonText })));
 191                         input[isRTL ? 'before' : 'after'](inst.trigger);
 192                         inst.trigger.click(function() {
 193                                 if ($.datepicker._datepickerShowing && $.datepicker._lastInput == target)
 194                                         $.datepicker._hideDatepicker();
 195                                 else
 196                                         $.datepicker._showDatepicker(target);
 197                                 return false;
 198                         });
 199                 }
 200                 input.addClass(this.markerClassName).keydown(this._doKeyDown).keypress(this._doKeyPress).
 201                         bind("setData.datepicker", function(event, key, value) {
 202                                 inst.settings[key] = value;
 203                         }).bind("getData.datepicker", function(event, key) {
 204                                 return this._get(inst, key);
 205                         });
 206                 $.data(target, PROP_NAME, inst);
 207         },
 208
 209         /* Attach an inline date picker to a div. */
 210         _inlineDatepicker: function(target, inst) {
 211                 var divSpan = $(target);
 212                 if (divSpan.hasClass(this.markerClassName))
 213                         return;
 214                 divSpan.addClass(this.markerClassName).append(inst.dpDiv).
 215                         bind("setData.datepicker", function(event, key, value){
 216                                 inst.settings[key] = value;
 217                         }).bind("getData.datepicker", function(event, key){
 218                                 return this._get(inst, key);
 219                         });
 220                 $.data(target, PROP_NAME, inst);
 221                 this._setDate(inst, this._getDefaultDate(inst));
 222                 this._updateDatepicker(inst);
 223                 this._updateAlternate(inst);
 224         },
 225
 226         /* Pop-up the date picker in a "dialog" box.
 227            @param  input     element - ignored
 228            @param  dateText  string - the initial date to display (in the current format)
 229            @param  onSelect  function - the function(dateText) to call when a date is selected
 230            @param  settings  object - update the dialog date picker instance's settings (anonymous object)
 231            @param  pos       int[2] - coordinates for the dialog's position within the screen or
 232                              event - with x/y coordinates or
 233                              leave empty for default (screen centre)
 234            @return the manager object */
 235         _dialogDatepicker: function(input, dateText, onSelect, settings, pos) {
 236                 var inst = this._dialogInst; // internal instance
 237                 if (!inst) {
 238                         var id = 'dp' + (++this.uuid);
 239                         this._dialogInput = $('<input type="text" id="' + id +
 240                                 '" size="1" style="position: absolute; top: -100px;"/>');
 241                         this._dialogInput.keydown(this._doKeyDown);
 242                         $('body').append(this._dialogInput);
 243                         inst = this._dialogInst = this._newInst(this._dialogInput, false);
 244                         inst.settings = {};
 245                         $.data(this._dialogInput[0], PROP_NAME, inst);
 246                 }
 247                 extendRemove(inst.settings, settings || {});
 248                 this._dialogInput.val(dateText);
 249
 250                 this._pos = (pos ? (pos.length ? pos : [pos.pageX, pos.pageY]) : null);
 251                 if (!this._pos) {
 252                         var browserWidth = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
 253                         var browserHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
 254                         var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
 255                         var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
 256                         this._pos = // should use actual width/height below
 257                                 [(browserWidth / 2) - 100 + scrollX, (browserHeight / 2) - 150 + scrollY];
 258                 }
 259
 260                 // move input on screen for focus, but hidden behind dialog
 261                 this._dialogInput.css('left', this._pos[0] + 'px').css('top', this._pos[1] + 'px');
 262                 inst.settings.onSelect = onSelect;
 263                 this._inDialog = true;
 264                 this.dpDiv.addClass(this._dialogClass);
 265                 this._showDatepicker(this._dialogInput[0]);
 266                 if ($.blockUI)
 267                         $.blockUI(this.dpDiv);
 268                 $.data(this._dialogInput[0], PROP_NAME, inst);
 269                 return this;
 270         },
 271
 272         /* Detach a datepicker from its control.
 273            @param  target    element - the target input field or division or span */
 274         _destroyDatepicker: function(target) {
 275                 var $target = $(target);
 276                 var inst = $.data(target, PROP_NAME);
 277                 if (!$target.hasClass(this.markerClassName)) {
 278                         return;
 279                 }
 280                 var nodeName = target.nodeName.toLowerCase();
 281                 $.removeData(target, PROP_NAME);
 282                 if (nodeName == 'input') {
 283                         inst.append.remove();
 284                         inst.trigger.remove();
 285                         $target.removeClass(this.markerClassName).
 286                                 unbind('focus', this._showDatepicker).
 287                                 unbind('keydown', this._doKeyDown).
 288                                 unbind('keypress', this._doKeyPress);
 289                 } else if (nodeName == 'div' || nodeName == 'span')
 290                         $target.removeClass(this.markerClassName).empty();
 291         },
 292
 293         /* Enable the date picker to a jQuery selection.
 294            @param  target    element - the target input field or division or span */
 295         _enableDatepicker: function(target) {
 296                 var $target = $(target);
 297                 var inst = $.data(target, PROP_NAME);
 298                 if (!$target.hasClass(this.markerClassName)) {
 299                         return;
 300                 }
 301                 var nodeName = target.nodeName.toLowerCase();
 302                 if (nodeName == 'input') {
 303                         target.disabled = false;
 304                         inst.trigger.filter('button').
 305                                 each(function() { this.disabled = false; }).end().
 306                                 filter('img').css({opacity: '1.0', cursor: ''});
 307                 }
 308                 else if (nodeName == 'div' || nodeName == 'span') {
 309                         var inline = $target.children('.' + this._inlineClass);
 310                         inline.children().removeClass('ui-state-disabled');
 311                 }
 312                 this._disabledInputs = $.map(this._disabledInputs,
 313                         function(value) { return (value == target ? null : value); }); // delete entry
 314         },
 315
 316         /* Disable the date picker to a jQuery selection.
 317            @param  target    element - the target input field or division or span */
 318         _disableDatepicker: function(target) {
 319                 var $target = $(target);
 320                 var inst = $.data(target, PROP_NAME);
 321                 if (!$target.hasClass(this.markerClassName)) {
 322                         return;
 323                 }
 324                 var nodeName = target.nodeName.toLowerCase();
 325                 if (nodeName == 'input') {
 326                         target.disabled = true;
 327                         inst.trigger.filter('button').
 328                                 each(function() { this.disabled = true; }).end().
 329                                 filter('img').css({opacity: '0.5', cursor: 'default'});
 330                 }
 331                 else if (nodeName == 'div' || nodeName == 'span') {
 332                         var inline = $target.children('.' + this._inlineClass);
 333                         inline.children().addClass('ui-state-disabled');
 334                 }
 335                 this._disabledInputs = $.map(this._disabledInputs,
 336                         function(value) { return (value == target ? null : value); }); // delete entry
 337                 this._disabledInputs[this._disabledInputs.length] = target;
 338         },
 339
 340         /* Is the first field in a jQuery collection disabled as a datepicker?
 341            @param  target    element - the target input field or division or span
 342            @return boolean - true if disabled, false if enabled */
 343         _isDisabledDatepicker: function(target) {
 344                 if (!target) {
 345                         return false;
 346                 }
 347                 for (var i = 0; i < this._disabledInputs.length; i++) {
 348                         if (this._disabledInputs[i] == target)
 349                                 return true;
 350                 }
 351                 return false;
 352         },
 353
 354         /* Retrieve the instance data for the target control.
 355            @param  target  element - the target input field or division or span
 356            @return  object - the associated instance data
 357            @throws  error if a jQuery problem getting data */
 358         _getInst: function(target) {
 359                 try {
 360                         return $.data(target, PROP_NAME);
 361                 }
 362                 catch (err) {
 363                         throw 'Missing instance data for this datepicker';
 364                 }
 365         },
 366
 367         /* Update or retrieve the settings for a date picker attached to an input field or division.
 368            @param  target  element - the target input field or division or span
 369            @param  name    object - the new settings to update or
 370                            string - the name of the setting to change or retrieve,
 371                            when retrieving also 'all' for all instance settings or
 372                            'defaults' for all global defaults
 373            @param  value   any - the new value for the setting
 374                            (omit if above is an object or to retrieve a value) */
 375         _optionDatepicker: function(target, name, value) {
 376                 var inst = this._getInst(target);
 377                 if (arguments.length == 2 && typeof name == 'string') {
 378                         return (name == 'defaults' ? $.extend({}, $.datepicker._defaults) :
 379                                 (inst ? (name == 'all' ? $.extend({}, inst.settings) :
 380                                 this._get(inst, name)) : null));
 381                 }
 382                 var settings = name || {};
 383                 if (typeof name == 'string') {
 384                         settings = {};
 385                         settings[name] = value;
 386                 }
 387                 if (inst) {
 388                         if (this._curInst == inst) {
 389                                 this._hideDatepicker(null);
 390                         }
 391                         var date = this._getDateDatepicker(target);
 392                         extendRemove(inst.settings, settings);
 393                         this._setDateDatepicker(target, date);
 394                         this._updateDatepicker(inst);
 395                 }
 396         },
 397
 398         // change method deprecated
 399         _changeDatepicker: function(target, name, value) {
 400                 this._optionDatepicker(target, name, value);
 401         },
 402
 403         /* Redraw the date picker attached to an input field or division.
 404            @param  target  element - the target input field or division or span */
 405         _refreshDatepicker: function(target) {
 406                 var inst = this._getInst(target);
 407                 if (inst) {
 408                         this._updateDatepicker(inst);
 409                 }
 410         },
 411
 412         /* Set the dates for a jQuery selection.
 413            @param  target   element - the target input field or division or span
 414            @param  date     Date - the new date
 415            @param  endDate  Date - the new end date for a range (optional) */
 416         _setDateDatepicker: function(target, date, endDate) {
 417                 var inst = this._getInst(target);
 418                 if (inst) {
 419                         this._setDate(inst, date, endDate);
 420                         this._updateDatepicker(inst);
 421                         this._updateAlternate(inst);
 422                 }
 423         },
 424
 425         /* Get the date(s) for the first entry in a jQuery selection.
 426            @param  target  element - the target input field or division or span
 427            @return Date - the current date or
 428                    Date[2] - the current dates for a range */
 429         _getDateDatepicker: function(target) {
 430                 var inst = this._getInst(target);
 431                 if (inst && !inst.inline)
 432                         this._setDateFromField(inst);
 433                 return (inst ? this._getDate(inst) : null);
 434         },
 435
 436         /* Handle keystrokes. */
 437         _doKeyDown: function(event) {
 438                 var inst = $.datepicker._getInst(event.target);
 439                 var handled = true;
 440                 var isRTL = inst.dpDiv.is('.ui-datepicker-rtl');
 441                 inst._keyEvent = true;
 442                 if ($.datepicker._datepickerShowing)
 443                         switch (event.keyCode) {
 444                                 case 9:  $.datepicker._hideDatepicker(null, '');
 445                                                 break; // hide on tab out
 446                                 case 13: var sel = $('td.' + $.datepicker._dayOverClass +
 447                                                         ', td.' + $.datepicker._currentClass, inst.dpDiv);
 448                                                 if (sel[0])
 449                                                         $.datepicker._selectDay(event.target, inst.selectedMonth, inst.selectedYear, sel[0]);
 450                                                 else
 451                                                         $.datepicker._hideDatepicker(null, $.datepicker._get(inst, 'duration'));
 452                                                 return false; // don't submit the form
 453                                                 break; // select the value on enter
 454                                 case 27: $.datepicker._hideDatepicker(null, $.datepicker._get(inst, 'duration'));
 455                                                 break; // hide on escape
 456                                 case 33: $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 457                                                         -$.datepicker._get(inst, 'stepBigMonths') :
 458                                                         -$.datepicker._get(inst, 'stepMonths')), 'M');
 459                                                 break; // previous month/year on page up/+ ctrl
 460                                 case 34: $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 461                                                         +$.datepicker._get(inst, 'stepBigMonths') :
 462                                                         +$.datepicker._get(inst, 'stepMonths')), 'M');
 463                                                 break; // next month/year on page down/+ ctrl
 464                                 case 35: if (event.ctrlKey || event.metaKey) $.datepicker._clearDate(event.target);
 465                                                 handled = event.ctrlKey || event.metaKey;
 466                                                 break; // clear on ctrl or command +end
 467                                 case 36: if (event.ctrlKey || event.metaKey) $.datepicker._gotoToday(event.target);
 468                                                 handled = event.ctrlKey || event.metaKey;
 469                                                 break; // current on ctrl or command +home
 470                                 case 37: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, (isRTL ? +1 : -1), 'D');
 471                                                 handled = event.ctrlKey || event.metaKey;
 472                                                 // -1 day on ctrl or command +left
 473                                                 if (event.originalEvent.altKey) $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 474                                                                         -$.datepicker._get(inst, 'stepBigMonths') :
 475                                                                         -$.datepicker._get(inst, 'stepMonths')), 'M');
 476                                                 // next month/year on alt +left on Mac
 477                                                 break;
 478                                 case 38: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, -7, 'D');
 479                                                 handled = event.ctrlKey || event.metaKey;
 480                                                 break; // -1 week on ctrl or command +up
 481                                 case 39: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, (isRTL ? -1 : +1), 'D');
 482                                                 handled = event.ctrlKey || event.metaKey;
 483                                                 // +1 day on ctrl or command +right
 484                                                 if (event.originalEvent.altKey) $.datepicker._adjustDate(event.target, (event.ctrlKey ?
 485                                                                         +$.datepicker._get(inst, 'stepBigMonths') :
 486                                                                         +$.datepicker._get(inst, 'stepMonths')), 'M');
 487                                                 // next month/year on alt +right
 488                                                 break;
 489                                 case 40: if (event.ctrlKey || event.metaKey) $.datepicker._adjustDate(event.target, +7, 'D');
 490                                                 handled = event.ctrlKey || event.metaKey;
 491                                                 break; // +1 week on ctrl or command +down
 492                                 default: handled = false;
 493                         }
 494                 else if (event.keyCode == 36 && event.ctrlKey) // display the date picker on ctrl+home
 495                         $.datepicker._showDatepicker(this);
 496                 else {
 497                         handled = false;
 498                 }
 499                 if (handled) {
 500                         event.preventDefault();
 501                         event.stopPropagation();
 502                 }
 503         },
 504
 505         /* Filter entered characters - based on date format. */
 506         _doKeyPress: function(event) {
 507                 var inst = $.datepicker._getInst(event.target);
 508                 if ($.datepicker._get(inst, 'constrainInput')) {
 509                         var chars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat'));
 510                         var chr = String.fromCharCode(event.charCode == undefined ? event.keyCode : event.charCode);
 511                         return event.ctrlKey || (chr < ' ' || !chars || chars.indexOf(chr) > -1);
 512                 }
 513         },
 514
 515         /* Pop-up the date picker for a given input field.
 516            @param  input  element - the input field attached to the date picker or
 517                           event - if triggered by focus */
 518         _showDatepicker: function(input) {
 519                 input = input.target || input;
 520                 if (input.nodeName.toLowerCase() != 'input') // find from button/image trigger
 521                         input = $('input', input.parentNode)[0];
 522                 if ($.datepicker._isDisabledDatepicker(input) || $.datepicker._lastInput == input) // already here
 523                         return;
 524                 var inst = $.datepicker._getInst(input);
 525                 var beforeShow = $.datepicker._get(inst, 'beforeShow');
 526                 extendRemove(inst.settings, (beforeShow ? beforeShow.apply(input, [input, inst]) : {}));
 527                 $.datepicker._hideDatepicker(null, '');
 528                 $.datepicker._lastInput = input;
 529                 $.datepicker._setDateFromField(inst);
 530                 if ($.datepicker._inDialog) // hide cursor
 531                         input.value = '';
 532                 if (!$.datepicker._pos) { // position below input
 533                         $.datepicker._pos = $.datepicker._findPos(input);
 534                         $.datepicker._pos[1] += input.offsetHeight; // add the height
 535                 }
 536                 var isFixed = false;
 537                 $(input).parents().each(function() {
 538                         isFixed |= $(this).css('position') == 'fixed';
 539                         return !isFixed;
 540                 });
 541                 if (isFixed && $.browser.opera) { // correction for Opera when fixed and scrolled
 542                         $.datepicker._pos[0] -= document.documentElement.scrollLeft;
 543                         $.datepicker._pos[1] -= document.documentElement.scrollTop;
 544                 }
 545                 var offset = {left: $.datepicker._pos[0], top: $.datepicker._pos[1]};
 546                 $.datepicker._pos = null;
 547                 inst.rangeStart = null;
 548                 // determine sizing offscreen
 549                 inst.dpDiv.css({position: 'absolute', display: 'block', top: '-1000px'});
 550                 $.datepicker._updateDatepicker(inst);
 551                 // fix width for dynamic number of date pickers
 552                 // and adjust position before showing
 553                 offset = $.datepicker._checkOffset(inst, offset, isFixed);
 554                 inst.dpDiv.css({position: ($.datepicker._inDialog && $.blockUI ?
 555                         'static' : (isFixed ? 'fixed' : 'absolute')), display: 'none',
 556                         left: offset.left + 'px', top: offset.top + 'px'});
 557                 if (!inst.inline) {
 558                         var showAnim = $.datepicker._get(inst, 'showAnim') || 'show';
 559                         var duration = $.datepicker._get(inst, 'duration');
 560                         var postProcess = function() {
 561                                 $.datepicker._datepickerShowing = true;
 562                                 if ($.browser.msie && parseInt($.browser.version,10) < 7) // fix IE < 7 select problems
 563                                         $('iframe.ui-datepicker-cover').css({width: inst.dpDiv.width() + 4,
 564                                                 height: inst.dpDiv.height() + 4});
 565                         };
 566                         if ($.effects && $.effects[showAnim])
 567                                 inst.dpDiv.show(showAnim, $.datepicker._get(inst, 'showOptions'), duration, postProcess);
 568                         else
 569                                 inst.dpDiv[showAnim](duration, postProcess);
 570                         if (duration == '')
 571                                 postProcess();
 572                         if (inst.input[0].type != 'hidden')
 573                                 inst.input[0].focus();
 574                         $.datepicker._curInst = inst;
 575                 }
 576         },
 577
 578         /* Generate the date picker content. */
 579         _updateDatepicker: function(inst) {
 580                 var dims = {width: inst.dpDiv.width() + 4,
 581                         height: inst.dpDiv.height() + 4};
 582                 var self = this;
 583                 inst.dpDiv.empty().append(this._generateHTML(inst))
 584                         .find('iframe.ui-datepicker-cover').
 585                                 css({width: dims.width, height: dims.height})
 586                         .end()
 587                         .find('button, .ui-datepicker-prev, .ui-datepicker-next, .ui-datepicker-calendar td a')
 588                                 .bind('mouseout', function(){
 589                                         $(this).removeClass('ui-state-hover');
 590                                         if(this.className.indexOf('ui-datepicker-prev') != -1) $(this).removeClass('ui-datepicker-prev-hover');
 591                                         if(this.className.indexOf('ui-datepicker-next') != -1) $(this).removeClass('ui-datepicker-next-hover');
 592                                 })
 593                                 .bind('mouseover', function(){
 594                                         if (!self._isDisabledDatepicker( inst.inline ? inst.dpDiv.parent()[0] : inst.input[0])) {
 595                                                 $(this).parents('.ui-datepicker-calendar').find('a').removeClass('ui-state-hover');
 596                                                 $(this).addClass('ui-state-hover');
 597                                                 if(this.className.indexOf('ui-datepicker-prev') != -1) $(this).addClass('ui-datepicker-prev-hover');
 598                                                 if(this.className.indexOf('ui-datepicker-next') != -1) $(this).addClass('ui-datepicker-next-hover');
 599                                         }
 600                                 })
 601                         .end()
 602                         .find('.' + this._dayOverClass + ' a')
 603                                 .trigger('mouseover')
 604                         .end();
 605                 var numMonths = this._getNumberOfMonths(inst);
 606                 var cols = numMonths[1];
 607                 var width = 17;
 608                 if (cols > 1) {
 609                         inst.dpDiv.addClass('ui-datepicker-multi-' + cols).css('width', (width * cols) + 'em');
 610                 } else {
 611                         inst.dpDiv.removeClass('ui-datepicker-multi-2 ui-datepicker-multi-3 ui-datepicker-multi-4').width('');
 612                 }
 613                 inst.dpDiv[(numMonths[0] != 1 || numMonths[1] != 1 ? 'add' : 'remove') +
 614                         'Class']('ui-datepicker-multi');
 615                 inst.dpDiv[(this._get(inst, 'isRTL') ? 'add' : 'remove') +
 616                         'Class']('ui-datepicker-rtl');
 617                 if (inst.input && inst.input[0].type != 'hidden' && inst == $.datepicker._curInst)
 618                         $(inst.input[0]).focus();
 619         },
 620
 621         /* Check positioning to remain on screen. */
 622         _checkOffset: function(inst, offset, isFixed) {
 623                 var dpWidth = inst.dpDiv.outerWidth();
 624                 var dpHeight = inst.dpDiv.outerHeight();
 625                 var inputWidth = inst.input ? inst.input.outerWidth() : 0;
 626                 var inputHeight = inst.input ? inst.input.outerHeight() : 0;
 627                 var viewWidth = (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) + $(document).scrollLeft();
 628                 var viewHeight = (window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight) + $(document).scrollTop();
 629
 630                 offset.left -= (this._get(inst, 'isRTL') ? (dpWidth - inputWidth) : 0);
 631                 offset.left -= (isFixed && offset.left == inst.input.offset().left) ? $(document).scrollLeft() : 0;
 632                 offset.top -= (isFixed && offset.top == (inst.input.offset().top + inputHeight)) ? $(document).scrollTop() : 0;
 633
 634                 // now check if datepicker is showing outside window viewport - move to a better place if so.
 635                 offset.left -= (offset.left + dpWidth > viewWidth && viewWidth > dpWidth) ? Math.abs(offset.left + dpWidth - viewWidth) : 0;
 636                 offset.top -= (offset.top + dpHeight > viewHeight && viewHeight > dpHeight) ? Math.abs(offset.top + dpHeight + inputHeight*2 - viewHeight) : 0;
 637
 638                 return offset;
 639         },
 640
 641         /* Find an object's position on the screen. */
 642         _findPos: function(obj) {
 643         while (obj && (obj.type == 'hidden' || obj.nodeType != 1)) {
 644             obj = obj.nextSibling;
 645         }
 646         var position = $(obj).offset();
 647             return [position.left, position.top];
 648         },
 649
 650         /* Hide the date picker from view.
 651            @param  input  element - the input field attached to the date picker
 652            @param  duration  string - the duration over which to close the date picker */
 653         _hideDatepicker: function(input, duration) {
 654                 var inst = this._curInst;
 655                 if (!inst || (input && inst != $.data(input, PROP_NAME)))
 656                         return;
 657                 if (inst.stayOpen)
 658                         this._selectDate('#' + inst.id, this._formatDate(inst,
 659                                 inst.currentDay, inst.currentMonth, inst.currentYear));
 660                 inst.stayOpen = false;
 661                 if (this._datepickerShowing) {
 662                         duration = (duration != null ? duration : this._get(inst, 'duration'));
 663                         var showAnim = this._get(inst, 'showAnim');
 664                         var postProcess = function() {
 665                                 $.datepicker._tidyDialog(inst);
 666                         };
 667                         if (duration != '' && $.effects && $.effects[showAnim])
 668                                 inst.dpDiv.hide(showAnim, $.datepicker._get(inst, 'showOptions'),
 669                                         duration, postProcess);
 670                         else
 671                                 inst.dpDiv[(duration == '' ? 'hide' : (showAnim == 'slideDown' ? 'slideUp' :
 672                                         (showAnim == 'fadeIn' ? 'fadeOut' : 'hide')))](duration, postProcess);
 673                         if (duration == '')
 674                                 this._tidyDialog(inst);
 675                         var onClose = this._get(inst, 'onClose');
 676                         if (onClose)
 677                                 onClose.apply((inst.input ? inst.input[0] : null),
 678                                         [(inst.input ? inst.input.val() : ''), inst]);  // trigger custom callback
 679                         this._datepickerShowing = false;
 680                         this._lastInput = null;
 681                         if (this._inDialog) {
 682                                 this._dialogInput.css({ position: 'absolute', left: '0', top: '-100px' });
 683                                 if ($.blockUI) {
 684                                         $.unblockUI();
 685                                         $('body').append(this.dpDiv);
 686                                 }
 687                         }
 688                         this._inDialog = false;
 689                 }
 690                 this._curInst = null;
 691         },
 692
 693         /* Tidy up after a dialog display. */
 694         _tidyDialog: function(inst) {
 695                 inst.dpDiv.removeClass(this._dialogClass).unbind('.ui-datepicker-calendar');
 696         },
 697
 698         /* Close date picker if clicked elsewhere. */
 699         _checkExternalClick: function(event) {
 700                 if (!$.datepicker._curInst)
 701                         return;
 702                 var $target = $(event.target);
 703                 if (($target.parents('#' + $.datepicker._mainDivId).length == 0) &&
 704                                 !$target.hasClass($.datepicker.markerClassName) &&
 705                                 !$target.hasClass($.datepicker._triggerClass) &&
 706                                 $.datepicker._datepickerShowing && !($.datepicker._inDialog && $.blockUI))
 707                         $.datepicker._hideDatepicker(null, '');
 708         },
 709
 710         /* Adjust one of the date sub-fields. */
 711         _adjustDate: function(id, offset, period) {
 712                 var target = $(id);
 713                 var inst = this._getInst(target[0]);
 714                 if (this._isDisabledDatepicker(target[0])) {
 715                         return;
 716                 }
 717                 this._adjustInstDate(inst, offset +
 718                         (period == 'M' ? this._get(inst, 'showCurrentAtPos') : 0), // undo positioning
 719                         period);
 720                 this._updateDatepicker(inst);
 721         },
 722
 723         /* Action for current link. */
 724         _gotoToday: function(id) {
 725                 var target = $(id);
 726                 var inst = this._getInst(target[0]);
 727                 if (this._get(inst, 'gotoCurrent') && inst.currentDay) {
 728                         inst.selectedDay = inst.currentDay;
 729                         inst.drawMonth = inst.selectedMonth = inst.currentMonth;
 730                         inst.drawYear = inst.selectedYear = inst.currentYear;
 731                 }
 732                 else {
 733                 var date = new Date();
 734                 inst.selectedDay = date.getDate();
 735                 inst.drawMonth = inst.selectedMonth = date.getMonth();
 736                 inst.drawYear = inst.selectedYear = date.getFullYear();
 737                 }
 738                 this._notifyChange(inst);
 739                 this._adjustDate(target);
 740         },
 741
 742         /* Action for selecting a new month/year. */
 743         _selectMonthYear: function(id, select, period) {
 744                 var target = $(id);
 745                 var inst = this._getInst(target[0]);
 746                 inst._selectingMonthYear = false;
 747                 inst['selected' + (period == 'M' ? 'Month' : 'Year')] =
 748                 inst['draw' + (period == 'M' ? 'Month' : 'Year')] =
 749                         parseInt(select.options[select.selectedIndex].value,10);
 750                 this._notifyChange(inst);
 751                 this._adjustDate(target);
 752         },
 753
 754         /* Restore input focus after not changing month/year. */
 755         _clickMonthYear: function(id) {
 756                 var target = $(id);
 757                 var inst = this._getInst(target[0]);
 758                 if (inst.input && inst._selectingMonthYear && !$.browser.msie)
 759                         inst.input[0].focus();
 760                 inst._selectingMonthYear = !inst._selectingMonthYear;
 761         },
 762
 763         /* Action for selecting a day. */
 764         _selectDay: function(id, month, year, td) {
 765                 var target = $(id);
 766                 if ($(td).hasClass(this._unselectableClass) || this._isDisabledDatepicker(target[0])) {
 767                         return;
 768                 }
 769                 var inst = this._getInst(target[0]);
 770                 inst.selectedDay = inst.currentDay = $('a', td).html();
 771                 inst.selectedMonth = inst.currentMonth = month;
 772                 inst.selectedYear = inst.currentYear = year;
 773                 if (inst.stayOpen) {
 774                         inst.endDay = inst.endMonth = inst.endYear = null;
 775                 }
 776                 this._selectDate(id, this._formatDate(inst,
 777                         inst.currentDay, inst.currentMonth, inst.currentYear));
 778                 if (inst.stayOpen) {
 779                         inst.rangeStart = this._daylightSavingAdjust(
 780                                 new Date(inst.currentYear, inst.currentMonth, inst.currentDay));
 781                         this._updateDatepicker(inst);
 782                 }
 783         },
 784
 785         /* Erase the input field and hide the date picker. */
 786         _clearDate: function(id) {
 787                 var target = $(id);
 788                 var inst = this._getInst(target[0]);
 789                 inst.stayOpen = false;
 790                 inst.endDay = inst.endMonth = inst.endYear = inst.rangeStart = null;
 791                 this._selectDate(target, '');
 792         },
 793
 794         /* Update the input field with the selected date. */
 795         _selectDate: function(id, dateStr) {
 796                 var target = $(id);
 797                 var inst = this._getInst(target[0]);
 798                 dateStr = (dateStr != null ? dateStr : this._formatDate(inst));
 799                 if (inst.input)
 800                         inst.input.val(dateStr);
 801                 this._updateAlternate(inst);
 802                 var onSelect = this._get(inst, 'onSelect');
 803                 if (onSelect)
 804                         onSelect.apply((inst.input ? inst.input[0] : null), [dateStr, inst]);  // trigger custom callback
 805                 else if (inst.input)
 806                         inst.input.trigger('change'); // fire the change event
 807                 if (inst.inline)
 808                         this._updateDatepicker(inst);
 809                 else if (!inst.stayOpen) {
 810                         this._hideDatepicker(null, this._get(inst, 'duration'));
 811                         this._lastInput = inst.input[0];
 812                         if (typeof(inst.input[0]) != 'object')
 813                                 inst.input[0].focus(); // restore focus
 814                         this._lastInput = null;
 815                 }
 816         },
 817
 818         /* Update any alternate field to synchronise with the main field. */
 819         _updateAlternate: function(inst) {
 820                 var altField = this._get(inst, 'altField');
 821                 if (altField) { // update alternate field too
 822                         var altFormat = this._get(inst, 'altFormat') || this._get(inst, 'dateFormat');
 823                         var date = this._getDate(inst);
 824                         dateStr = this.formatDate(altFormat, date, this._getFormatConfig(inst));
 825                         $(altField).each(function() { $(this).val(dateStr); });
 826                 }
 827         },
 828
 829         /* Set as beforeShowDay function to prevent selection of weekends.
 830            @param  date  Date - the date to customise
 831            @return [boolean, string] - is this date selectable?, what is its CSS class? */
 832         noWeekends: function(date) {
 833                 var day = date.getDay();
 834                 return [(day > 0 && day < 6), ''];
 835         },
 836
 837         /* Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
 838            @param  date  Date - the date to get the week for
 839            @return  number - the number of the week within the year that contains this date */
 840         iso8601Week: function(date) {
 841                 var checkDate = new Date(date.getFullYear(), date.getMonth(), date.getDate());
 842                 var firstMon = new Date(checkDate.getFullYear(), 1 - 1, 4); // First week always contains 4 Jan
 843                 var firstDay = firstMon.getDay() || 7; // Day of week: Mon = 1, ..., Sun = 7
 844                 firstMon.setDate(firstMon.getDate() + 1 - firstDay); // Preceding Monday
 845                 if (firstDay < 4 && checkDate < firstMon) { // Adjust first three days in year if necessary
 846                         checkDate.setDate(checkDate.getDate() - 3); // Generate for previous year
 847                         return $.datepicker.iso8601Week(checkDate);
 848                 } else if (checkDate > new Date(checkDate.getFullYear(), 12 - 1, 28)) { // Check last three days in year
 849                         firstDay = new Date(checkDate.getFullYear() + 1, 1 - 1, 4).getDay() || 7;
 850                         if (firstDay > 4 && (checkDate.getDay() || 7) < firstDay - 3) { // Adjust if necessary
 851                                 return 1;
 852                         }
 853                 }
 854                 return Math.floor(((checkDate - firstMon) / 86400000) / 7) + 1; // Weeks to given date
 855         },
 856
 857         /* Parse a string value into a date object.
 858            See formatDate below for the possible formats.
 859
 860            @param  format    string - the expected format of the date
 861            @param  value     string - the date in the above format
 862            @param  settings  Object - attributes include:
 863                              shortYearCutoff  number - the cutoff year for determining the century (optional)
 864                              dayNamesShort    string[7] - abbreviated names of the days from Sunday (optional)
 865                              dayNames         string[7] - names of the days from Sunday (optional)
 866                              monthNamesShort  string[12] - abbreviated names of the months (optional)
 867                              monthNames       string[12] - names of the months (optional)
 868            @return  Date - the extracted date value or null if value is blank */
 869         parseDate: function (format, value, settings) {
 870                 if (format == null || value == null)
 871                         throw 'Invalid arguments';
 872                 value = (typeof value == 'object' ? value.toString() : value + '');
 873                 if (value == '')
 874                         return null;
 875                 var shortYearCutoff = (settings ? settings.shortYearCutoff : null) || this._defaults.shortYearCutoff;
 876                 var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
 877                 var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
 878                 var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
 879                 var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
 880                 var year = -1;
 881                 var month = -1;
 882                 var day = -1;
 883                 var doy = -1;
 884                 var literal = false;
 885                 // Check whether a format character is doubled
 886                 var lookAhead = function(match) {
 887                         var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
 888                         if (matches)
 889                                 iFormat++;
 890                         return matches;
 891                 };
 892                 // Extract a number from the string value
 893                 var getNumber = function(match) {
 894                         lookAhead(match);
 895                         var origSize = (match == '@' ? 14 : (match == 'y' ? 4 : (match == 'o' ? 3 : 2)));
 896                         var size = origSize;
 897                         var num = 0;
 898                         while (size > 0 && iValue < value.length &&
 899                                         value.charAt(iValue) >= '0' && value.charAt(iValue) <= '9') {
 900                                 num = num * 10 + parseInt(value.charAt(iValue++),10);
 901                                 size--;
 902                         }
 903                         if (size == origSize)
 904                                 throw 'Missing number at position ' + iValue;
 905                         return num;
 906                 };
 907                 // Extract a name from the string value and convert to an index
 908                 var getName = function(match, shortNames, longNames) {
 909                         var names = (lookAhead(match) ? longNames : shortNames);
 910                         var size = 0;
 911                         for (var j = 0; j < names.length; j++)
 912                                 size = Math.max(size, names[j].length);
 913                         var name = '';
 914                         var iInit = iValue;
 915                         while (size > 0 && iValue < value.length) {
 916                                 name += value.charAt(iValue++);
 917                                 for (var i = 0; i < names.length; i++)
 918                                         if (name == names[i])
 919                                                 return i + 1;
 920                                 size--;
 921                         }
 922                         throw 'Unknown name at position ' + iInit;
 923                 };
 924                 // Confirm that a literal character matches the string value
 925                 var checkLiteral = function() {
 926                         if (value.charAt(iValue) != format.charAt(iFormat))
 927                                 throw 'Unexpected literal at position ' + iValue;
 928                         iValue++;
 929                 };
 930                 var iValue = 0;
 931                 for (var iFormat = 0; iFormat < format.length; iFormat++) {
 932                         if (literal)
 933                                 if (format.charAt(iFormat) == "'" && !lookAhead("'"))
 934                                         literal = false;
 935                                 else
 936                                         checkLiteral();
 937                         else
 938                                 switch (format.charAt(iFormat)) {
 939                                         case 'd':
 940                                                 day = getNumber('d');
 941                                                 break;
 942                                         case 'D':
 943                                                 getName('D', dayNamesShort, dayNames);
 944                                                 break;
 945                                         case 'o':
 946                                                 doy = getNumber('o');
 947                                                 break;
 948                                         case 'm':
 949                                                 month = getNumber('m');
 950                                                 break;
 951                                         case 'M':
 952                                                 month = getName('M', monthNamesShort, monthNames);
 953                                                 break;
 954                                         case 'y':
 955                                                 year = getNumber('y');
 956                                                 break;
 957                                         case '@':
 958                                                 var date = new Date(getNumber('@'));
 959                                                 year = date.getFullYear();
 960                                                 month = date.getMonth() + 1;
 961                                                 day = date.getDate();
 962                                                 break;
 963                                         case "'":
 964                                                 if (lookAhead("'"))
 965                                                         checkLiteral();
 966                                                 else
 967                                                         literal = true;
 968                                                 break;
 969                                         default:
 970                                                 checkLiteral();
 971                                 }
 972                 }
 973                 if (year == -1)
 974                         year = new Date().getFullYear();
 975                 else if (year < 100)
 976                         year += new Date().getFullYear() - new Date().getFullYear() % 100 +
 977                                 (year <= shortYearCutoff ? 0 : -100);
 978                 if (doy > -1) {
 979                         month = 1;
 980                         day = doy;
 981                         do {
 982                                 var dim = this._getDaysInMonth(year, month - 1);
 983                                 if (day <= dim)
 984                                         break;
 985                                 month++;
 986                                 day -= dim;
 987                         } while (true);
 988                 }
 989                 var date = this._daylightSavingAdjust(new Date(year, month - 1, day));
 990                 if (date.getFullYear() != year || date.getMonth() + 1 != month || date.getDate() != day)
 991                         throw 'Invalid date'; // E.g. 31/02/*
 992                 return date;
 993         },
 994
 995         /* Standard date formats. */
 996         ATOM: 'yy-mm-dd', // RFC 3339 (ISO 8601)
 997         COOKIE: 'D, dd M yy',
 998         ISO_8601: 'yy-mm-dd',
 999         RFC_822: 'D, d M y',
1000         RFC_850: 'DD, dd-M-y',
1001         RFC_1036: 'D, d M y',
1002         RFC_1123: 'D, d M yy',
1003         RFC_2822: 'D, d M yy',
1004         RSS: 'D, d M y', // RFC 822
1005         TIMESTAMP: '@',
1006         W3C: 'yy-mm-dd', // ISO 8601
1007
1008         /* Format a date object into a string value.
1009            The format can be combinations of the following:
1010            d  - day of month (no leading zero)
1011            dd - day of month (two digit)
1012            o  - day of year (no leading zeros)
1013            oo - day of year (three digit)
1014            D  - day name short
1015            DD - day name long
1016            m  - month of year (no leading zero)
1017            mm - month of year (two digit)
1018            M  - month name short
1019            MM - month name long
1020            y  - year (two digit)
1021            yy - year (four digit)
1022            @ - Unix timestamp (ms since 01/01/1970)
1023            '...' - literal text
1024            '' - single quote
1025
1026            @param  format    string - the desired format of the date
1027            @param  date      Date - the date value to format
1028            @param  settings  Object - attributes include:
1029                              dayNamesShort    string[7] - abbreviated names of the days from Sunday (optional)
1030                              dayNames         string[7] - names of the days from Sunday (optional)
1031                              monthNamesShort  string[12] - abbreviated names of the months (optional)
1032                              monthNames       string[12] - names of the months (optional)
1033            @return  string - the date in the above format */
1034         formatDate: function (format, date, settings) {
1035                 if (!date)
1036                         return '';
1037                 var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;
1038                 var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;
1039                 var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;
1040                 var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;
1041                 // Check whether a format character is doubled
1042                 var lookAhead = function(match) {
1043                         var matches = (iFormat + 1 < format.length && format.charAt(iFormat + 1) == match);
1044                         if (matches)
1045                                 iFormat++;
1046                         return matches;
1047                 };
1048                 // Format a number, with leading zero if necessary
1049                 var formatNumber = function(match, value, len) {
1050                         var num = '' + value;
1051                         if (lookAhead(match))
1052                                 while (num.length < len)
1053                                         num = '0' + num;
1054                         return num;
1055                 };
1056                 // Format a name, short or long as requested
1057                 var formatName = function(match, value, shortNames, longNames) {
1058                         return (lookAhead(match) ? longNames[value] : shortNames[value]);
1059                 };
1060                 var output = '';
1061                 var literal = false;
1062                 if (date)
1063                         for (var iFormat = 0; iFormat < format.length; iFormat++) {
1064                                 if (literal)
1065                                         if (format.charAt(iFormat) == "'" && !lookAhead("'"))
1066                                                 literal = false;
1067                                         else
1068                                                 output += format.charAt(iFormat);
1069                                 else
1070                                         switch (format.charAt(iFormat)) {
1071                                                 case 'd':
1072                                                         output += formatNumber('d', date.getDate(), 2);
1073                                                         break;
1074                                                 case 'D':
1075                                                         output += formatName('D', date.getDay(), dayNamesShort, dayNames);
1076                                                         break;
1077                                                 case 'o':
1078                                                         var doy = date.getDate();
1079                                                         for (var m = date.getMonth() - 1; m >= 0; m--)
1080                                                                 doy += this._getDaysInMonth(date.getFullYear(), m);
1081                                                         output += formatNumber('o', doy, 3);
1082                                                         break;
1083                                                 case 'm':
1084                                                         output += formatNumber('m', date.getMonth() + 1, 2);
1085                                                         break;
1086                                                 case 'M':
1087                                                         output += formatName('M', date.getMonth(), monthNamesShort, monthNames);
1088                                                         break;
1089                                                 case 'y':
1090                                                         output += (lookAhead('y') ? date.getFullYear() :
1091                                                                 (date.getYear() % 100 < 10 ? '0' : '') + date.getYear() % 100);
1092                                                         break;
1093                                                 case '@':
1094                                                         output += date.getTime();
1095                                                         break;
1096                                                 case "'":
1097                                                         if (lookAhead("'"))
1098                                                                 output += "'";
1099                                                         else
1100                                                                 literal = true;
1101                                                         break;
1102                                                 default:
1103                                                         output += format.charAt(iFormat);
1104                                         }
1105                         }
1106                 return output;
1107         },
1108
1109         /* Extract all possible characters from the date format. */
1110         _possibleChars: function (format) {
1111                 var chars = '';
1112                 var literal = false;
1113                 for (var iFormat = 0; iFormat < format.length; iFormat++)
1114                         if (literal)
1115                                 if (format.charAt(iFormat) == "'" && !lookAhead("'"))
1116                                         literal = false;
1117                                 else
1118                                         chars += format.charAt(iFormat);
1119                         else
1120                                 switch (format.charAt(iFormat)) {
1121                                         case 'd': case 'm': case 'y': case '@':
1122                                                 chars += '0123456789';
1123                                                 break;
1124                                         case 'D': case 'M':
1125                                                 return null; // Accept anything
1126                                         case "'":
1127                                                 if (lookAhead("'"))
1128                                                         chars += "'";
1129                                                 else
1130                                                         literal = true;
1131                                                 break;
1132                                         default:
1133                                                 chars += format.charAt(iFormat);
1134                                 }
1135                 return chars;
1136         },
1137
1138         /* Get a setting value, defaulting if necessary. */
1139         _get: function(inst, name) {
1140                 return inst.settings[name] !== undefined ?
1141                         inst.settings[name] : this._defaults[name];
1142         },
1143
1144         /* Parse existing date and initialise date picker. */
1145         _setDateFromField: function(inst) {
1146                 var dateFormat = this._get(inst, 'dateFormat');
1147                 var dates = inst.input ? inst.input.val() : null;
1148                 inst.endDay = inst.endMonth = inst.endYear = null;
1149                 var date = defaultDate = this._getDefaultDate(inst);
1150                 var settings = this._getFormatConfig(inst);
1151                 try {
1152                         date = this.parseDate(dateFormat, dates, settings) || defaultDate;
1153                 } catch (event) {
1154                         this.log(event);
1155                         date = defaultDate;
1156                 }
1157                 inst.selectedDay = date.getDate();
1158                 inst.drawMonth = inst.selectedMonth = date.getMonth();
1159                 inst.drawYear = inst.selectedYear = date.getFullYear();
1160                 inst.currentDay = (dates ? date.getDate() : 0);
1161                 inst.currentMonth = (dates ? date.getMonth() : 0);
1162                 inst.currentYear = (dates ? date.getFullYear() : 0);
1163                 this._adjustInstDate(inst);
1164         },
1165
1166         /* Retrieve the default date shown on opening. */
1167         _getDefaultDate: function(inst) {
1168                 var date = this._determineDate(this._get(inst, 'defaultDate'), new Date());
1169                 var minDate = this._getMinMaxDate(inst, 'min', true);
1170                 var maxDate = this._getMinMaxDate(inst, 'max');
1171                 date = (minDate && date < minDate ? minDate : date);
1172                 date = (maxDate && date > maxDate ? maxDate : date);
1173                 return date;
1174         },
1175
1176         /* A date may be specified as an exact value or a relative one. */
1177         _determineDate: function(date, defaultDate) {
1178                 var offsetNumeric = function(offset) {
1179                         var date = new Date();
1180                         date.setDate(date.getDate() + offset);
1181                         return date;
1182                 };
1183                 var offsetString = function(offset, getDaysInMonth) {
1184                         var date = new Date();
1185                         var year = date.getFullYear();
1186                         var month = date.getMonth();
1187                         var day = date.getDate();
1188                         var pattern = /([+-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g;
1189                         var matches = pattern.exec(offset);
1190                         while (matches) {
1191                                 switch (matches[2] || 'd') {
1192                                         case 'd' : case 'D' :
1193                                                 day += parseInt(matches[1],10); break;
1194                                         case 'w' : case 'W' :
1195                                                 day += parseInt(matches[1],10) * 7; break;
1196                                         case 'm' : case 'M' :
1197                                                 month += parseInt(matches[1],10);
1198                                                 day = Math.min(day, getDaysInMonth(year, month));
1199                                                 break;
1200                                         case 'y': case 'Y' :
1201                                                 year += parseInt(matches[1],10);
1202                                                 day = Math.min(day, getDaysInMonth(year, month));
1203                                                 break;
1204                                 }
1205                                 matches = pattern.exec(offset);
1206                         }
1207                         return new Date(year, month, day);
1208                 };
1209                 date = (date == null ? defaultDate :
1210                         (typeof date == 'string' ? offsetString(date, this._getDaysInMonth) :
1211                         (typeof date == 'number' ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : date)));
1212                 date = (date && date.toString() == 'Invalid Date' ? defaultDate : date);
1213                 if (date) {
1214                         date.setHours(0);
1215                         date.setMinutes(0);
1216                         date.setSeconds(0);
1217                         date.setMilliseconds(0);
1218                 }
1219                 return this._daylightSavingAdjust(date);
1220         },
1221
1222         /* Handle switch to/from daylight saving.
1223            Hours may be non-zero on daylight saving cut-over:
1224            > 12 when midnight changeover, but then cannot generate
1225            midnight datetime, so jump to 1AM, otherwise reset.
1226            @param  date  (Date) the date to check
1227            @return  (Date) the corrected date */
1228         _daylightSavingAdjust: function(date) {
1229                 if (!date) return null;
1230                 date.setHours(date.getHours() > 12 ? date.getHours() + 2 : 0);
1231                 return date;
1232         },
1233
1234         /* Set the date(s) directly. */
1235         _setDate: function(inst, date, endDate) {
1236                 var clear = !(date);
1237                 var origMonth = inst.selectedMonth;
1238                 var origYear = inst.selectedYear;
1239                 date = this._determineDate(date, new Date());
1240                 inst.selectedDay = inst.currentDay = date.getDate();
1241                 inst.drawMonth = inst.selectedMonth = inst.currentMonth = date.getMonth();
1242                 inst.drawYear = inst.selectedYear = inst.currentYear = date.getFullYear();
1243                 if (origMonth != inst.selectedMonth || origYear != inst.selectedYear)
1244                         this._notifyChange(inst);
1245                 this._adjustInstDate(inst);
1246                 if (inst.input) {
1247                         inst.input.val(clear ? '' : this._formatDate(inst));
1248                 }
1249         },
1250
1251         /* Retrieve the date(s) directly. */
1252         _getDate: function(inst) {
1253                 var startDate = (!inst.currentYear || (inst.input && inst.input.val() == '') ? null :
1254                         this._daylightSavingAdjust(new Date(
1255                         inst.currentYear, inst.currentMonth, inst.currentDay)));
1256                         return startDate;
1257         },
1258
1259         /* Generate the HTML for the current state of the date picker. */
1260         _generateHTML: function(inst) {
1261                 var today = new Date();
1262                 today = this._daylightSavingAdjust(
1263                         new Date(today.getFullYear(), today.getMonth(), today.getDate())); // clear time
1264                 var isRTL = this._get(inst, 'isRTL');
1265                 var showButtonPanel = this._get(inst, 'showButtonPanel');
1266                 var hideIfNoPrevNext = this._get(inst, 'hideIfNoPrevNext');
1267                 var navigationAsDateFormat = this._get(inst, 'navigationAsDateFormat');
1268                 var numMonths = this._getNumberOfMonths(inst);
1269                 var showCurrentAtPos = this._get(inst, 'showCurrentAtPos');
1270                 var stepMonths = this._get(inst, 'stepMonths');
1271                 var stepBigMonths = this._get(inst, 'stepBigMonths');
1272                 var isMultiMonth = (numMonths[0] != 1 || numMonths[1] != 1);
1273                 var currentDate = this._daylightSavingAdjust((!inst.currentDay ? new Date(9999, 9, 9) :
1274                         new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
1275                 var minDate = this._getMinMaxDate(inst, 'min', true);
1276                 var maxDate = this._getMinMaxDate(inst, 'max');
1277                 var drawMonth = inst.drawMonth - showCurrentAtPos;
1278                 var drawYear = inst.drawYear;
1279                 if (drawMonth < 0) {
1280                         drawMonth += 12;
1281                         drawYear--;
1282                 }
1283                 if (maxDate) {
1284                         var maxDraw = this._daylightSavingAdjust(new Date(maxDate.getFullYear(),
1285                                 maxDate.getMonth() - numMonths[1] + 1, maxDate.getDate()));
1286                         maxDraw = (minDate && maxDraw < minDate ? minDate : maxDraw);
1287                         while (this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1)) > maxDraw) {
1288                                 drawMonth--;
1289                                 if (drawMonth < 0) {
1290                                         drawMonth = 11;
1291                                         drawYear--;
1292                                 }
1293                         }
1294                 }
1295                 inst.drawMonth = drawMonth;
1296                 inst.drawYear = drawYear;
1297                 var prevText = this._get(inst, 'prevText');
1298                 prevText = (!navigationAsDateFormat ? prevText : this.formatDate(prevText,
1299                         this._daylightSavingAdjust(new Date(drawYear, drawMonth - stepMonths, 1)),
1300                         this._getFormatConfig(inst)));
1301                 var prev = (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ?
1302                         '<a class="ui-datepicker-prev ui-corner-all" onclick="DP_jQuery.datepicker._adjustDate(\'#' + inst.id + '\', -' + stepMonths + ', \'M\');"' +
1303                         ' title="' + prevText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>' :
1304                         (hideIfNoPrevNext ? '' : '<a class="ui-datepicker-prev ui-corner-all ui-state-disabled" title="'+ prevText +'"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'e' : 'w') + '">' + prevText + '</span></a>'));
1305                 var nextText = this._get(inst, 'nextText');
1306                 nextText = (!navigationAsDateFormat ? nextText : this.formatDate(nextText,
1307                         this._daylightSavingAdjust(new Date(drawYear, drawMonth + stepMonths, 1)),
1308                         this._getFormatConfig(inst)));
1309                 var next = (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?
1310                         '<a class="ui-datepicker-next ui-corner-all" onclick="DP_jQuery.datepicker._adjustDate(\'#' + inst.id + '\', +' + stepMonths + ', \'M\');"' +
1311                         ' title="' + nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>' :
1312                         (hideIfNoPrevNext ? '' : '<a class="ui-datepicker-next ui-corner-all ui-state-disabled" title="'+ nextText + '"><span class="ui-icon ui-icon-circle-triangle-' + ( isRTL ? 'w' : 'e') + '">' + nextText + '</span></a>'));
1313                 var currentText = this._get(inst, 'currentText');
1314                 var gotoDate = (this._get(inst, 'gotoCurrent') && inst.currentDay ? currentDate : today);
1315                 currentText = (!navigationAsDateFormat ? currentText :
1316                         this.formatDate(currentText, gotoDate, this._getFormatConfig(inst)));
1317                 var controls = (!inst.inline ? '<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" onclick="DP_jQuery.datepicker._hideDatepicker();">' + this._get(inst, 'closeText') + '</button>' : '');
1318                 var buttonPanel = (showButtonPanel) ? '<div class="ui-datepicker-buttonpane ui-widget-content">' + (isRTL ? controls : '') +
1319                         (this._isInRange(inst, gotoDate) ? '<button type="button" class="ui-datepicker-current ui-state-default ui-priority-secondary ui-corner-all" onclick="DP_jQuery.datepicker._gotoToday(\'#' + inst.id + '\');"' +
1320                         '>' + currentText + '</button>' : '') + (isRTL ? '' : controls) + '</div>' : '';
1321                 var firstDay = parseInt(this._get(inst, 'firstDay'),10);
1322                 firstDay = (isNaN(firstDay) ? 0 : firstDay);
1323                 var dayNames = this._get(inst, 'dayNames');
1324                 var dayNamesShort = this._get(inst, 'dayNamesShort');
1325                 var dayNamesMin = this._get(inst, 'dayNamesMin');
1326                 var monthNames = this._get(inst, 'monthNames');
1327                 var monthNamesShort = this._get(inst, 'monthNamesShort');
1328                 var beforeShowDay = this._get(inst, 'beforeShowDay');
1329                 var showOtherMonths = this._get(inst, 'showOtherMonths');
1330                 var calculateWeek = this._get(inst, 'calculateWeek') || this.iso8601Week;
1331                 var endDate = inst.endDay ? this._daylightSavingAdjust(
1332                         new Date(inst.endYear, inst.endMonth, inst.endDay)) : currentDate;
1333                 var defaultDate = this._getDefaultDate(inst);
1334                 var html = '';
1335                 for (var row = 0; row < numMonths[0]; row++) {
1336                         var group = '';
1337                         for (var col = 0; col < numMonths[1]; col++) {
1338                                 var selectedDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, inst.selectedDay));
1339                                 var cornerClass = ' ui-corner-all';
1340                                 var calender = '';
1341                                 if (isMultiMonth) {
1342                                         calender += '<div class="ui-datepicker-group ui-datepicker-group-';
1343                                         switch (col) {
1344                                                 case 0: calender += 'first'; cornerClass = ' ui-corner-' + (isRTL ? 'right' : 'left'); break;
1345                                                 case numMonths[1]-1: calender += 'last'; cornerClass = ' ui-corner-' + (isRTL ? 'left' : 'right'); break;
1346                                                 default: calender += 'middle'; cornerClass = ''; break;
1347                                         }
1348                                         calender += '">';
1349                                 }
1350                                 calender += '<div class="ui-datepicker-header ui-widget-header ui-helper-clearfix' + cornerClass + '">' +
1351                                         (/all|left/.test(cornerClass) && row == 0 ? (isRTL ? next : prev) : '') +
1352                                         (/all|right/.test(cornerClass) && row == 0 ? (isRTL ? prev : next) : '') +
1353                                         this._generateMonthYearHeader(inst, drawMonth, drawYear, minDate, maxDate,
1354                                         selectedDate, row > 0 || col > 0, monthNames, monthNamesShort) + // draw month headers
1355                                         '</div><table class="ui-datepicker-calendar"><thead>' +
1356                                         '<tr>';
1357                                 var thead = '';
1358                                 for (var dow = 0; dow < 7; dow++) { // days of the week
1359                                         var day = (dow + firstDay) % 7;
1360                                         thead += '<th' + ((dow + firstDay + 6) % 7 >= 5 ? ' class="ui-datepicker-week-end"' : '') + '>' +
1361                                                 '<span title="' + dayNames[day] + '">' + dayNamesMin[day] + '</span></th>';
1362                                 }
1363                                 calender += thead + '</tr></thead><tbody>';
1364                                 var daysInMonth = this._getDaysInMonth(drawYear, drawMonth);
1365                                 if (drawYear == inst.selectedYear && drawMonth == inst.selectedMonth)
1366                                         inst.selectedDay = Math.min(inst.selectedDay, daysInMonth);
1367                                 var leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;
1368                                 var numRows = (isMultiMonth ? 6 : Math.ceil((leadDays + daysInMonth) / 7)); // calculate the number of rows to generate
1369                                 var printDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1 - leadDays));
1370                                 for (var dRow = 0; dRow < numRows; dRow++) { // create date picker rows
1371                                         calender += '<tr>';
1372                                         var tbody = '';
1373                                         for (var dow = 0; dow < 7; dow++) { // create date picker days
1374                                                 var daySettings = (beforeShowDay ?
1375                                                         beforeShowDay.apply((inst.input ? inst.input[0] : null), [printDate]) : [true, '']);
1376                                                 var otherMonth = (printDate.getMonth() != drawMonth);
1377                                                 var unselectable = otherMonth || !daySettings[0] ||
1378                                                         (minDate && printDate < minDate) || (maxDate && printDate > maxDate);
1379                                                 tbody += '<td class="' +
1380                                                         ((dow + firstDay + 6) % 7 >= 5 ? ' ui-datepicker-week-end' : '') + // highlight weekends
1381                                                         (otherMonth ? ' ui-datepicker-other-month' : '') + // highlight days from other months
1382                                                         ((printDate.getTime() == selectedDate.getTime() && drawMonth == inst.selectedMonth && inst._keyEvent) || // user pressed key
1383                                                         (defaultDate.getTime() == printDate.getTime() && defaultDate.getTime() == selectedDate.getTime()) ?
1384                                                         // or defaultDate is current printedDate and defaultDate is selectedDate
1385                                                         ' ' + this._dayOverClass : '') + // highlight selected day
1386                                                         (unselectable ? ' ' + this._unselectableClass + ' ui-state-disabled': '') +  // highlight unselectable days
1387                                                         (otherMonth && !showOtherMonths ? '' : ' ' + daySettings[1] + // highlight custom dates
1388                                                         (printDate.getTime() >= currentDate.getTime() && printDate.getTime() <= endDate.getTime() ? // in current range
1389                                                         ' ' + this._currentClass : '') + // highlight selected day
1390                                                         (printDate.getTime() == today.getTime() ? ' ui-datepicker-today' : '')) + '"' + // highlight today (if different)
1391                                                         ((!otherMonth || showOtherMonths) && daySettings[2] ? ' title="' + daySettings[2] + '"' : '') + // cell title
1392                                                         (unselectable ? '' : ' onclick="DP_jQuery.datepicker._selectDay(\'#' +
1393                                                         inst.id + '\',' + drawMonth + ',' + drawYear + ', this);return false;"') + '>' + // actions
1394                                                         (otherMonth ? (showOtherMonths ? printDate.getDate() : '&#xa0;') : // display for other months
1395                                                         (unselectable ? '<span class="ui-state-default">' + printDate.getDate() + '</span>' : '<a class="ui-state-default' +
1396                                                         (printDate.getTime() == today.getTime() ? ' ui-state-highlight' : '') +
1397                                                         (printDate.getTime() >= currentDate.getTime() && printDate.getTime() <= endDate.getTime() ? // in current range
1398                                                         ' ui-state-active' : '') + // highlight selected day
1399                                                         '" href="#">' + printDate.getDate() + '</a>')) + '</td>'; // display for this month
1400                                                 printDate.setDate(printDate.getDate() + 1);
1401                                                 printDate = this._daylightSavingAdjust(printDate);
1402                                         }
1403                                         calender += tbody + '</tr>';
1404                                 }
1405                                 drawMonth++;
1406                                 if (drawMonth > 11) {
1407                                         drawMonth = 0;
1408                                         drawYear++;
1409                                 }
1410                                 calender += '</tbody></table>' + (isMultiMonth ? '</div>' +
1411                                                         ((numMonths[0] > 0 && col == numMonths[1]-1) ? '<div class="ui-datepicker-row-break"></div>' : '') : '');
1412                                 group += calender;
1413                         }
1414                         html += group;
1415                 }
1416                 html += buttonPanel + ($.browser.msie && parseInt($.browser.version,10) < 7 && !inst.inline ?
1417                         '<iframe src="javascript:false;" class="ui-datepicker-cover" frameborder="0"></iframe>' : '');
1418                 inst._keyEvent = false;
1419                 return html;
1420         },
1421
1422         /* Generate the month and year header. */
1423         _generateMonthYearHeader: function(inst, drawMonth, drawYear, minDate, maxDate,
1424                         selectedDate, secondary, monthNames, monthNamesShort) {
1425                 minDate = (inst.rangeStart && minDate && selectedDate < minDate ? selectedDate : minDate);
1426                 var changeMonth = this._get(inst, 'changeMonth');
1427                 var changeYear = this._get(inst, 'changeYear');
1428                 var showMonthAfterYear = this._get(inst, 'showMonthAfterYear');
1429                 var html = '<div class="ui-datepicker-title">';
1430                 var monthHtml = '';
1431                 // month selection
1432                 if (secondary || !changeMonth)
1433                         monthHtml += '<span class="ui-datepicker-month">' + monthNames[drawMonth] + '</span> ';
1434                 else {
1435                         var inMinYear = (minDate && minDate.getFullYear() == drawYear);
1436                         var inMaxYear = (maxDate && maxDate.getFullYear() == drawYear);
1437                         monthHtml += '<select class="ui-datepicker-month" ' +
1438                                 'onchange="DP_jQuery.datepicker._selectMonthYear(\'#' + inst.id + '\', this, \'M\');" ' +
1439                                 'onclick="DP_jQuery.datepicker._clickMonthYear(\'#' + inst.id + '\');"' +
1440                                 '>';
1441                         for (var month = 0; month < 12; month++) {
1442                                 if ((!inMinYear || month >= minDate.getMonth()) &&
1443                                                 (!inMaxYear || month <= maxDate.getMonth()))
1444                                         monthHtml += '<option value="' + month + '"' +
1445                                                 (month == drawMonth ? ' selected="selected"' : '') +
1446                                                 '>' + monthNamesShort[month] + '</option>';
1447                         }
1448                         monthHtml += '</select>';
1449                 }
1450                 if (!showMonthAfterYear)
1451                         html += monthHtml + ((secondary || changeMonth || changeYear) && (!(changeMonth && changeYear)) ? '&#xa0;' : '');
1452                 // year selection
1453                 if (secondary || !changeYear)
1454                         html += '<span class="ui-datepicker-year">' + drawYear + '</span>';
1455                 else {
1456                         // determine range of years to display
1457                         var years = this._get(inst, 'yearRange').split(':');
1458                         var year = 0;
1459                         var endYear = 0;
1460                         if (years.length != 2) {
1461                                 year = drawYear - 10;
1462                                 endYear = drawYear + 10;
1463                         } else if (years[0].charAt(0) == '+' || years[0].charAt(0) == '-') {
1464                                 year = drawYear + parseInt(years[0], 10);
1465                                 endYear = drawYear + parseInt(years[1], 10);
1466                         } else {
1467                                 year = parseInt(years[0], 10);
1468                                 endYear = parseInt(years[1], 10);
1469                         }
1470                         year = (minDate ? Math.max(year, minDate.getFullYear()) : year);
1471                         endYear = (maxDate ? Math.min(endYear, maxDate.getFullYear()) : endYear);
1472                         html += '<select class="ui-datepicker-year" ' +
1473                                 'onchange="DP_jQuery.datepicker._selectMonthYear(\'#' + inst.id + '\', this, \'Y\');" ' +
1474                                 'onclick="DP_jQuery.datepicker._clickMonthYear(\'#' + inst.id + '\');"' +
1475                                 '>';
1476                         for (; year <= endYear; year++) {
1477                                 html += '<option value="' + year + '"' +
1478                                         (year == drawYear ? ' selected="selected"' : '') +
1479                                         '>' + year + '</option>';
1480                         }
1481                         html += '</select>';
1482                 }
1483                 if (showMonthAfterYear)
1484                         html += (secondary || changeMonth || changeYear ? '&#xa0;' : '') + monthHtml;
1485                 html += '</div>'; // Close datepicker_header
1486                 return html;
1487         },
1488
1489         /* Adjust one of the date sub-fields. */
1490         _adjustInstDate: function(inst, offset, period) {
1491                 var year = inst.drawYear + (period == 'Y' ? offset : 0);
1492                 var month = inst.drawMonth + (period == 'M' ? offset : 0);
1493                 var day = Math.min(inst.selectedDay, this._getDaysInMonth(year, month)) +
1494                         (period == 'D' ? offset : 0);
1495                 var date = this._daylightSavingAdjust(new Date(year, month, day));
1496                 // ensure it is within the bounds set
1497                 var minDate = this._getMinMaxDate(inst, 'min', true);
1498                 var maxDate = this._getMinMaxDate(inst, 'max');
1499                 date = (minDate && date < minDate ? minDate : date);
1500                 date = (maxDate && date > maxDate ? maxDate : date);
1501                 inst.selectedDay = date.getDate();
1502                 inst.drawMonth = inst.selectedMonth = date.getMonth();
1503                 inst.drawYear = inst.selectedYear = date.getFullYear();
1504                 if (period == 'M' || period == 'Y')
1505                         this._notifyChange(inst);
1506         },
1507
1508         /* Notify change of month/year. */
1509         _notifyChange: function(inst) {
1510                 var onChange = this._get(inst, 'onChangeMonthYear');
1511                 if (onChange)
1512                         onChange.apply((inst.input ? inst.input[0] : null),
1513                                 [inst.selectedYear, inst.selectedMonth + 1, inst]);
1514         },
1515
1516         /* Determine the number of months to show. */
1517         _getNumberOfMonths: function(inst) {
1518                 var numMonths = this._get(inst, 'numberOfMonths');
1519                 return (numMonths == null ? [1, 1] : (typeof numMonths == 'number' ? [1, numMonths] : numMonths));
1520         },
1521
1522         /* Determine the current maximum date - ensure no time components are set - may be overridden for a range. */
1523         _getMinMaxDate: function(inst, minMax, checkRange) {
1524                 var date = this._determineDate(this._get(inst, minMax + 'Date'), null);
1525                 return (!checkRange || !inst.rangeStart ? date :
1526                         (!date || inst.rangeStart > date ? inst.rangeStart : date));
1527         },
1528
1529         /* Find the number of days in a given month. */
1530         _getDaysInMonth: function(year, month) {
1531                 return 32 - new Date(year, month, 32).getDate();
1532         },
1533
1534         /* Find the day of the week of the first of a month. */
1535         _getFirstDayOfMonth: function(year, month) {
1536                 return new Date(year, month, 1).getDay();
1537         },
1538
1539         /* Determines if we should allow a "next/prev" month display change. */
1540         _canAdjustMonth: function(inst, offset, curYear, curMonth) {
1541                 var numMonths = this._getNumberOfMonths(inst);
1542                 var date = this._daylightSavingAdjust(new Date(
1543                         curYear, curMonth + (offset < 0 ? offset : numMonths[1]), 1));
1544                 if (offset < 0)
1545                         date.setDate(this._getDaysInMonth(date.getFullYear(), date.getMonth()));
1546                 return this._isInRange(inst, date);
1547         },
1548
1549         /* Is the given date in the accepted range? */
1550         _isInRange: function(inst, date) {
1551                 // during range selection, use minimum of selected date and range start
1552                 var newMinDate = (!inst.rangeStart ? null : this._daylightSavingAdjust(
1553                         new Date(inst.selectedYear, inst.selectedMonth, inst.selectedDay)));
1554                 newMinDate = (newMinDate && inst.rangeStart < newMinDate ? inst.rangeStart : newMinDate);
1555                 var minDate = newMinDate || this._getMinMaxDate(inst, 'min');
1556                 var maxDate = this._getMinMaxDate(inst, 'max');
1557                 return ((!minDate || date >= minDate) && (!maxDate || date <= maxDate));
1558         },
1559
1560         /* Provide the configuration settings for formatting/parsing. */
1561         _getFormatConfig: function(inst) {
1562                 var shortYearCutoff = this._get(inst, 'shortYearCutoff');
1563                 shortYearCutoff = (typeof shortYearCutoff != 'string' ? shortYearCutoff :
1564                         new Date().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
1565                 return {shortYearCutoff: shortYearCutoff,
1566                         dayNamesShort: this._get(inst, 'dayNamesShort'), dayNames: this._get(inst, 'dayNames'),
1567                         monthNamesShort: this._get(inst, 'monthNamesShort'), monthNames: this._get(inst, 'monthNames')};
1568         },
1569
1570         /* Format the given date for display. */
1571         _formatDate: function(inst, day, month, year) {
1572                 if (!day) {
1573                         inst.currentDay = inst.selectedDay;
1574                         inst.currentMonth = inst.selectedMonth;
1575                         inst.currentYear = inst.selectedYear;
1576                 }
1577                 var date = (day ? (typeof day == 'object' ? day :
1578                         this._daylightSavingAdjust(new Date(year, month, day))) :
1579                         this._daylightSavingAdjust(new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));
1580                 return this.formatDate(this._get(inst, 'dateFormat'), date, this._getFormatConfig(inst));
1581         }
1582 });
1583
1584 /* jQuery extend now ignores nulls! */
1585 function extendRemove(target, props) {
1586         $.extend(target, props);
1587         for (var name in props)
1588                 if (props[name] == null || props[name] == undefined)
1589                         target[name] = props[name];
1590         return target;
1591 };
1592
1593 /* Determine whether an object is an array. */
1594 function isArray(a) {
1595         return (a && (($.browser.safari && typeof a == 'object' && a.length) ||
1596                 (a.constructor && a.constructor.toString().match(/\Array\(\)/))));
1597 };
1598
1599 /* Invoke the datepicker functionality.
1600    @param  options  string - a command, optionally followed by additional parameters or
1601                     Object - settings for attaching new datepicker functionality
1602    @return  jQuery object */
1603 $.fn.datepicker = function(options){
1604
1605         /* Initialise the date picker. */
1606         if (!$.datepicker.initialized) {
1607                 $(document).mousedown($.datepicker._checkExternalClick).
1608                         find('body').append($.datepicker.dpDiv);
1609                 $.datepicker.initialized = true;
1610         }
1611
1612         var otherArgs = Array.prototype.slice.call(arguments, 1);
1613         if (typeof options == 'string' && (options == 'isDisabled' || options == 'getDate'))
1614                 return $.datepicker['_' + options + 'Datepicker'].
1615                         apply($.datepicker, [this[0]].concat(otherArgs));
1616         if (options == 'option' && arguments.length == 2 && typeof arguments[1] == 'string')
1617                 return $.datepicker['_' + options + 'Datepicker'].
1618                         apply($.datepicker, [this[0]].concat(otherArgs));
1619         return this.each(function() {
1620                 typeof options == 'string' ?
1621                         $.datepicker['_' + options + 'Datepicker'].
1622                                 apply($.datepicker, [this].concat(otherArgs)) :
1623                         $.datepicker._attachDatepicker(this, options);
1624         });
1625 };
1626
1627 $.datepicker = new Datepicker(); // singleton instance
1628 $.datepicker.initialized = false;
1629 $.datepicker.uuid = new Date().getTime();
1630 $.datepicker.version = "1.7.2";
1631
1632 // Workaround for #4055
1633 // Add another global to avoid noConflict issues with inline event handlers
1634 window.DP_jQuery = $;
1635
1636 })(jQuery);