/*!!
Epoch DHTML JavaScript Calendar - Version 2.0.1
Primary JavaScript File
(c) 2006 MeanFreePath
Free for NON-COMMERCIAL use - see website for details and updates
http://www.meanfreepath.com/javascript_calendar/index.html
!!*/

/**
* The main Epoch class.  All publicly-accessible methods and properties are called from this class
*/

function attachEventListener(obj,event,func){
    if( window.addEventListener ){
      if( event == 'onload' ) event = 'load';
      window.addEventListener(event,func,false);
    }
    else {
      window.attachEvent(event, func);
    }
}
  
function Epoch(name,mode,targetelement,multiselect) {
  var self = this; //workaround due to varying definitions of "this" in variable scopes. see http://www.meanfreepath.com/support/epoch/epoch.html#self for details
  //DEFINE PRIVATE METHODS
  //-----------------------------------------------------------------------------
  /**
  * Declares and initializes the calendar variables.  All the variables here can be safely changed
  * (within reason ;) by the developer
  */
  function calConfig() {
    self.versionNumber = '2.0.1';
    self.displayYearInitial = self.curDate.getFullYear(); //the initial year to display on load
    self.displayMonthInitial = self.curDate.getMonth(); //the initial month to display on load (0-11)
    self.displayYear = self.displayYearInitial;
    self.displayMonth = self.displayMonthInitial;
    self.minDate = new Date(1900,1,1);
    self.maxDate = new Date(2100,12,31);
    self.startDay = 0; // the day the week will 'start' on: 0(Sun) to 6(Sat)
    self.showWeeks = true; //whether the week numbers will be shown
    self.selCurMonthOnly = true; //allow user to only select dates in the currently displayed month
  }
  //-----------------------------------------------------------------------------
  /**
  * All language settings for Epoch are made here.
  * Check Date.dateFormat() for the Date object's language settings
  */
  function setLang() {
    self.daylist = new Array('Do','Lu','Ma','Mi','Ju','Vi','Sa','Do','Lu','Ma','Mi','Ju','Vi','Sa');
    self.months_sh = new Array('Ene','Feb','Mar','Abr','May','Jun','Jul','Ago','Sep','Oct','Nov','Dic');
    self.monthup_title = 'Ir al mes siguiente';
    self.monthdn_title = 'Ir al mes anterior';
    self.clearbtn_caption = 'Limpiar';
    self.clearbtn_title = 'Limpiar todas las fechas seleccionadas en el calendario';
    self.maxrange_caption = 'Este es el rango máximo';
    self.closebtn_caption = 'Cerrar';
    self.closebtn_title = 'Cerrar calendario';
  }
  //-----------------------------------------------------------------------------
  /**
  * Initializes the standard Gregorian Calendar parameters
  */
  function setDays() {
    self.daynames = new Array();
    var j=0;
    for(var i=self.startDay;i<self.startDay + 7;i++) {
      self.daynames[j++] = self.daylist[i];
    }
    self.monthDayCount = new Array(31,((self.curDate.getFullYear() - 2000) % 4 ? 28 : 29),31,30,31,30,31,31,30,31,30,31);
  }
  //-----------------------------------------------------------------------------
  /**
  * Creates the full DOM implementation of the calendar
  */
  function createCalendar() {
    var tbody, tr, td;
    self.calendar = document.createElement('table');
    self.calendar.setAttribute('id',self.name+'_calendar');
    setClass(self.calendar,'calendar');
    self.calendar.style.display = 'none'; //default to invisible
    //to prevent IE from selecting text when clicking on the calendar
    addEventHandler(self.calendar,'selectstart', function() {return false;});
    addEventHandler(self.calendar,'drag', function() {return false;});
    tbody = document.createElement('tbody');

    //create the Main Calendar Heading
    tr = document.createElement('tr');
    td = document.createElement('td');
    td.appendChild(createMainHeading());
    tr.appendChild(td);
    tbody.appendChild(tr);

    //create the calendar Day Heading & the calendar Day Cells
    tr = document.createElement('tr');
    td = document.createElement('td');
    self.calendar.celltable = document.createElement('table');
    setClass(self.calendar.celltable,'cells');
    self.calendar.celltable.appendChild(createDayHeading());
    self.calendar.celltable.appendChild(createCalCells());
    td.appendChild(self.calendar.celltable);
    tr.appendChild(td);
    tbody.appendChild(tr);

    //create the calendar footer
    tr = document.createElement('tr');
    td = document.createElement('td');
    td.appendChild(createFooter());
    tr.appendChild(td);
    tbody.appendChild(tr);

    //add the tbody element to the main calendar table
    self.calendar.appendChild(tbody);

    //and add the onmouseover events to the calendar table
    addEventHandler(self.calendar,'mouseover',cal_onmouseover);
    addEventHandler(self.calendar,'mouseout',cal_onmouseout);
  }
  //-----------------------------------------------------------------------------
  /**
  * Creates the primary calendar heading, with months & years
  */
  function createMainHeading() {
    //create the containing <div> element
    var container = document.createElement('div');
    setClass(container,'mainheading');
    //create the child elements and other variables
    self.monthSelect = document.createElement('select');
    self.yearSelect = document.createElement('select');
    var monthDn = document.createElement('input'), monthUp = document.createElement('input');
    var opt, i;
    //fill the month select box
    for(i=0;i<12;i++) {
      opt = document.createElement('option');
      opt.setAttribute('value',i);
      if(self.displayMonth == i) {
        opt.setAttribute('selected','selected');
      }
      opt.appendChild(document.createTextNode(self.months_sh[i]));
      self.monthSelect.appendChild(opt);
    }
    //and fill the year select box
    var yrMax = self.maxDate.getFullYear(), yrMin = self.minDate.getFullYear();
    for(i=yrMin;i<=yrMax;i++) {
      opt = document.createElement('option');
      opt.setAttribute('value',i);
      if(self.displayYear == i) {
        opt.setAttribute('selected','selected');
      }
      opt.appendChild(document.createTextNode(i));
      self.yearSelect.appendChild(opt);
    }
    //add the appropriate children for the month buttons
    monthUp.setAttribute('type','button');
    monthUp.setAttribute('value','>');
    monthUp.setAttribute('title',self.monthup_title);
    monthDn.setAttribute('type','button');
    monthDn.setAttribute('value','<');
    monthDn.setAttribute('title',self.monthdn_title);
    self.monthSelect.owner = self.yearSelect.owner = monthUp.owner = monthDn.owner = self;  //hack to allow us to access self calendar in the events (<fix>??)

    //assign the event handlers for the controls
    function selectonchange()	{
      if(self.goToMonth(self.yearSelect.value,self.monthSelect.value)) {
        self.displayMonth = self.monthSelect.value;
        self.displayYear = self.yearSelect.value;
      }
      else {
        self.monthSelect.value = self.displayMonth;
        self.yearSelect.value = self.displayYear;
      }
    }
    addEventHandler(monthUp,'click',function(){self.nextMonth();});
    addEventHandler(monthDn,'click',function(){self.prevMonth();});
    addEventHandler(self.monthSelect,'change',selectonchange);
    addEventHandler(self.yearSelect,'change',selectonchange);

    //and finally add the elements to the containing div
    container.appendChild(monthDn);
    container.appendChild(self.monthSelect);
    container.appendChild(self.yearSelect);
    container.appendChild(monthUp);
    return container;
  }
  //-----------------------------------------------------------------------------
  /**
  * Creates the footer of the calendar - goes under the calendar cells
  */
  function createFooter() {
    var container = document.createElement('div');
    var clearSelected = document.createElement('input');
    clearSelected.setAttribute('type','button');
    clearSelected.setAttribute('value',self.clearbtn_caption);
    clearSelected.setAttribute('title',self.clearbtn_title);
    clearSelected.owner = self;
    addEventHandler(clearSelected,'click',function() {self.resetSelections(false);});
    container.appendChild(clearSelected);
    if(self.mode == 'popup') {
      var closeBtn = document.createElement('input');
      closeBtn.setAttribute('type','button')
      closeBtn.setAttribute('value',self.closebtn_caption);
      closeBtn.setAttribute('title',self.closebtn_title);
      addEventHandler(closeBtn,'click',function(){self.hide();});
      setClass(closeBtn,'closeBtn');
      container.appendChild(closeBtn);
    }
    return container;
  }
  //-----------------------------------------------------------------------------
  /**
  * Creates the heading containing the day names
  */
  function createDayHeading() {
    //create the table element
    self.calHeading = document.createElement('thead');
    setClass(self.calHeading,'caldayheading');
    var tr = document.createElement('tr'), th;
    self.cols = new Array(false,false,false,false,false,false,false);

    //if we're showing the week headings, create an empty <td> for filler
    if(self.showWeeks) {
      th = document.createElement('th');
      setClass(th,'wkhead');
      tr.appendChild(th);
    }
    //populate the day titles
    for(var dow=0;dow<7;dow++) {
      th = document.createElement('th');
      th.appendChild(document.createTextNode(self.daynames[dow]));
      if(self.selectMultiple) { //if selectMultiple is true, assign the cell a CalHeading Object to handle all events
        th.headObj = new CalHeading(self,th,(dow + self.startDay < 7 ? dow + self.startDay : dow + self.startDay - 7));
      }
      tr.appendChild(th);
    }
    self.calHeading.appendChild(tr);
    return self.calHeading;
  }
  //-----------------------------------------------------------------------------
  /**
  * Creates the table containing the calendar day cells
  */
  function createCalCells() {
    self.rows = new Array(false,false,false,false,false,false);
    self.cells = new Array();
    var row = -1, totalCells = (self.showWeeks ? 48 : 42);
    var beginDate = new Date(self.displayYear,self.displayMonth,1);
    var endDate = new Date(self.displayYear,self.displayMonth,self.monthDayCount[self.displayMonth]);
    var sdt = new Date(beginDate);
    sdt.setDate(sdt.getDate() + (self.startDay - beginDate.getDay()) - (self.startDay - beginDate.getDay() > 0 ? 7 : 0) );
    //create the table element to hold the cells
    self.calCells = document.createElement('tbody');
    var tr,td;
    var cellIdx = 0, cell, week, dayval;

    for(var i=0;i<totalCells;i++) {
      if(self.showWeeks) { //if we are showing the week headings
        if(i % 8 == 0) {
          row++;
          week = sdt.getWeek(self.startDay);
          tr = document.createElement('tr');
          td = document.createElement('td');
          if(self.selectMultiple) { //if selectMultiple is enabled, create the associated weekObj objects
            td.weekObj = new WeekHeading(self,td,week,row)
          }
          else {//otherwise just set the class of the td for consistent look
            setClass(td,'wkhead');
          }
          td.appendChild(document.createTextNode(week));
          tr.appendChild(td);
          i++;
        }
      }
      else if(i % 7 == 0) { //otherwise, new row every 7 cells
        row++;
        week = sdt.getWeek(self.startDay);
        tr = document.createElement('tr');
      }
      //create the day cells
      dayval = sdt.getDate();
      td = document.createElement('td');
      td.appendChild(document.createTextNode(dayval));
      cell = new CalCell(self,td,sdt,row,week);//,'normal',sdt.getTime() >= self.minDate.getTime() && sdt.getTime() <= self.maxDate.getTime());
      self.cells[cellIdx] = cell;
      td.cellObj = cell;
      tr.appendChild(td);
      self.calCells.appendChild(tr);
      self.reDraw(cellIdx++); //and paint the cell according to its properties
      sdt.setDate(dayval + 1); //increment the date
    }
    return self.calCells;
  }
  //-----------------------------------------------------------------------------
  /**
  * Runs all the operations necessary to change the mode of the calendar
  * @param HTMLInputElement targetelement
  */
  function setMode(targetelement)	{
    if(self.mode == 'popup') { //set positioning to absolute for popup
      self.calendar.style.position = 'absolute';
    }
    //if a target element has been set, append the calendar to it
    if(targetelement) {
      switch(self.mode) {
        case 'flat':
          self.tgt = targetelement;
          self.tgt.appendChild(self.calendar);
          self.visible = true;
          break;
        case 'popup':
          self.calendar.style.position = 'absolute';
          document.body.appendChild(self.calendar);
          self.setTarget(targetelement,false);
          break;
      }
    }
    else { //otherwise, add the calendar to the document.body (useful if targetelement will not be defined until after the calendar is initialized)
      document.body.appendChild(self.calendar);
      self.visible = false;
    }
  }
  //-----------------------------------------------------------------------------
  /**
  * Removes the calendar table cells from the DOM (does not delete the cell objects associated with them)
  */
  function deleteCells() {
    self.calendar.celltable.removeChild(self.calendar.celltable.childNodes[1]); //remove the tbody element from the cell table
  }
  //-----------------------------------------------------------------------------
  /**
  * Sets the CSS class of the element, W3C & IE
  * @param HTMLElement element
  * @param string className
  */
  function setClass(element,className) {
    element.setAttribute('class',className);
    element.setAttribute('className',className); //<iehack>
  }
  /**
  * Updates a cell's data, including css class and selection properties
  * @param int cellindex
  */
  function setCellProperties(cellindex) {
    var cell = self.cells[cellindex];
    var date;
    idx = self.dateInArray(self.dates,cell.date);
    if(idx > -1) {
      date = self.dates[idx]; //reduce indirection
      cell.date.selected = date.selected || false;
      cell.date.type = date.type;
      cell.date.canSelect = date.canSelect;
      cell.setTitle(date.title);
      cell.setURL(date.href);
      cell.setHTML(date.cellHTML);
    }
    else {
      cell.date.selected = false; //if the cell's date isn't in the dates array, set it's selected value to false
    }
    //make all cells lying outside the min and max dates un-selectable
    if(cell.date.getTime() < self.minDate.getTime() || cell.date.getTime() > self.maxDate.getTime()) {
      cell.date.canSelect = false;
    }
    cell.setClass();
  }
  //-----------------------------------------------------------------------------
  function cal_onmouseover() {
    self.mousein = true;
  }
  //-----------------------------------------------------------------------------
  function cal_onmouseout()	{
    self.mousein = false;
  }
  //-----------------------------------------------------------------------------
  /**
   * Updates the calendar's selectedDates pointer array
   */
  function updateSelectedDates() {
    var idx = 0;
    self.selectedDates = new Array();
    for(i=0;i<self.dates.length;i++) {
      if(self.dates[i].selected) {
        self.selectedDates[idx++] = self.dates[i];
      }
    }
  }
  //PUBLIC METHODS
  //-----------------------------------------------------------------------------
  /**
  * Find a date in the given array, returning its index if found, -1 if not
  * @param array arr
  * @param Date searchVal
  * @param int startIndex
  * @return int
  */
  self.dateInArray = function(arr,searchVal,startIndex) {
    startIndex = (startIndex != null ? startIndex : 0); //default startIndex to 0, if not set
    for(var i=startIndex;i<arr.length;i++) {
      if(searchVal.getUeDay() == arr[i].getUeDay()) {
        return i;
      }
    }
    return -1;
  };
  //-----------------------------------------------------------------------------
  /**
  * Changes the target element of this calendar to another input.
  * Many thanks to Jake Olefsky - jake@olefsky.com
  * @param HTMLInputElement targetelement
  * @param bool focus
  */
  self.setTarget = function (targetelement, focus)
  {
    //if this is a popup calendar
    if(self.mode == 'popup') {
      //declare the event handlers for the target element
      function popupFocus() {
        self.show();
      }
      function popupBlur() {
        if(!self.mousein){
          self.hide();
        }
      }
      function popupKeyDown() {
        self.hide();
      }
      //unset old target element event handlers (if there is one yet)
      if(self.tgt) {
        removeEventHandler(self.tgt,'focus',popupFocus);
        removeEventHandler(self.tgt,'blur',popupBlur);
        removeEventHandler(self.tgt,'keydown',popupKeyDown);
      }
      //and set the new target element
      self.tgt = targetelement;
      //create a pointer to the INPUT's date object and init the new data array
      var dto = self.tgt.dateObj,pdateArr = new Array;
      //if a date is set for the target element
      if(dto) {
        if(self.tgt.value.length) { //load it into the calendar...
          pdateArr[0] = dto;
        }
        self.goToMonth(dto.getFullYear(),dto.getMonth()); //...and go to the target's month/year
      }
      self.selectDates(pdateArr,true,true,true);

      self.topOffset = self.tgt.offsetHeight; // the vertical distance (in pixels) to display the calendar from the Top of its input element
      self.leftOffset = 0; 					// the horizontal distance (in pixels) to display the calendar from the Left of its input element
      self.updatePos(self.tgt);
      //and add the event handlers to the new element
      addEventHandler(self.tgt,'focus',popupFocus);
      addEventHandler(self.tgt,'blur',popupBlur);
      addEventHandler(self.tgt,'keydown',popupKeyDown);
      if(focus !== false) { //focus the target element immediately, unless otherwise specified
        popupFocus();
      }
    }
    else { //if this is a flat or inline calendar
      //if the target is already set, remove the calendar's DOM representation from it
      if(self.tgt) {
        self.tgt.removeChild(self.calendar);
      }
      //now, set the calendar's target to the new target element, and show the calendar
      self.tgt = targetelement;
      self.tgt.appendChild(self.calendar);
      self.show();
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Go to the next month.  if the month is December, go to January of the next year
  * Returns true if the month will be incremented
  * @return bool
  */
  self.nextMonth = function () {
    var month = self.displayMonth;
    var year = self.displayYear;
    //increment the month/year values, provided they're within the min/max ranges
    if(self.displayMonth < 11) { //i.e. if currently in the year
      month++;
    }
    else if(self.yearSelect.value < self.maxDate.getFullYear()) { //if not, increment the year as well
      month = 0;
      year++;
    }
    return self.goToMonth(year,month);
  };
  //-----------------------------------------------------------------------------
  /**
  * Go to the previous month - if the month is January, go to December of the previous year.
  * Returns true if the month will be decremented
  * @return bool
  */
  self.prevMonth = function () {
    var month = self.displayMonth;
    var year = self.displayYear;
    //increment the month/year values, provided they're within the min/max ranges
    if(self.displayMonth > 0) { //i.e. if currently in the year
      month--;
    }
    else { //if not, decrement the year as well
      month = 11;
      year--;
    }
    return self.goToMonth(year,month);
  };
  //-----------------------------------------------------------------------------
  /**
  * Sets the calendar to display the requested month/year, returning true if the
  * date is within the minimum and maximum allowed dates
  * @param int year
  * @param int month
  * @return bool
  */
  self.goToMonth = function (year,month) {
    var testdatemin = new Date(year, month, 31);
    var testdatemax = new Date(year, month, 1);
    if(testdatemin >= self.minDate && testdatemax <= self.maxDate) {
      self.monthSelect.value = self.displayMonth = month;
      self.yearSelect.value = self.displayYear = year;
      //recreate the calendar for the new month
      createCalCells();
      deleteCells();
      self.calendar.celltable.appendChild(self.calCells);
      return true;
    }
    else {
      alert(self.maxrange_caption);
      return false;
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Moves the calendar's position to the target element's location (popup mode only)
  */
  self.updatePos = function (target) {
    if(self.mode == 'popup') {
      self.calendar.style.top = getTop(target) + self.topOffset + 'px';
      self.calendar.style.left = getLeft(target) + self.leftOffset + 'px';
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Displays the calendar
  */
  self.show = function ()	{
    self.updatePos(self.tgt); //update the calendar position, in case the page layout has changed since loading
    self.calendar.style.display = 'block'; //'table'; //<iehack> 'table' is the W3C-recommended spec, but IE isn't a fan of those
    self.visible = true;
  };
  //-----------------------------------------------------------------------------
  /**
  * Hides the calendar
  */
  self.hide = function () {
    self.calendar.style.display = 'none';
    self.visible = false;
  };
  //-----------------------------------------------------------------------------
  /**
  * Toggles (shows/hides) the calendar depending on its current state
  */
  self.toggle = function () {
    self.visible ? self.hide() : self.show();
  };
  //-----------------------------------------------------------------------------
  /**
  * Adds the array "dates" to the calendar's dates array, removing duplicate dates,
  * and redraws the calendar if redraw is true
  * @param array dates
  * @param bool redraw
  */
  self.addDates = function (dates,redraw) {
    var i;
    for(i=0;i<dates.length;i++) {
      if(self.dateInArray(self.dates,dates[i]) == -1) { //if the date isn't already in the array, add it!
        self.dates[self.dates.length] = dates[i];
      }
    }
    //now rebuild the selectedDates pointer array
    updateSelectedDates();
    if(redraw != false) { //redraw  the calendar if "redraw" is false or undefined
      self.reDraw();
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Removes the dates from the calendar's dates array and redraws the calendar
  * if redraw is true
  * @param array dates
  * @param bool redraw
  */
  self.removeDates = function (dates,redraw) {
    var idx;
    for(var i=0;i<dates.length;i++) {
      idx = self.dateInArray(self.dates,dates[i]);
      if(idx != -1) { //search for the dates in the dates array, removing them if the dates match
        self.dates.splice(idx,1);
      }
    }
    updateSelectedDates();
    if(redraw != false) { //redraw  the calendar if "redraw" is true or undefined
      self.reDraw();
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Selects or Deselects an array of dates
  * @param Array inpdates
  * @param bool selectVal
  * @param bool redraw
  * @param bool removeothers
  */
  self.selectDates = function (inpdates,selectVal,redraw,removeothers) {
    var i, idx;
    if(removeothers == true) {
      for(i=0;i<self.dates.length;i++) {
        self.dates[i].selected = false;
      }
    }
    for(i=0;i<inpdates.length;i++) {
      idx = self.dateInArray(self.dates,inpdates[i]);
      if(selectVal == true) {
        inpdates[i].selected = true;
        if(idx == -1) { //if the date does not exist in the calendar's dates array, add it
          self.dates[self.dates.length] = inpdates[i];
        }
        else { //if not, just select it
          self.dates[idx].selected = true;
        }
      }
      else { //if deselecting...
        if(idx > -1) { //if the date is found, deselect and/or remove it from the calendar's dates array
          self.dates[idx].selected = inpdates[i].selected = false;
          if(self.dates[idx].type == 'normal') { //remove 'normal' dates from the dates array, since they're useless unless selected
            self.dates.splice(idx,1);
          }
        }
      }
    }
    //now rebuild the selectedDates pointer array
    updateSelectedDates();
    if(redraw != false) { //redraw the calendar if "redraw" is false or undefined
      self.reDraw();
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Adds the dates in dates as hidden inputs to the form "form".  inputname
  * is the name of each hidden element
  * @param string form
  * @param string inputname
  */
  self.sendForm = function(form,inputname) {
    var inp = inputname || 'epochdates';
    for(var i=0;i<self.dates.length;i++)
    {
      inp = document.createElement('input');
      inp.setAttribute('type','hidden');
      inp.setAttribute('name',inputname + '[]');
      inp.setAttribute('value',encodeURIComponent(self.dates[i].dateFormat('Y-m-d')));  //default to the ISO date format
      form.appendChild(inp);
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Erases the dates array and resets the calendar's selection variables to defaults.
  * If retMonth is true, the calendar will return to the initial default month/year
  * @param bool retMonth
  */
  self.resetSelections = function (retMonth) {
    var dateArray = new Array();
    var dt = self.dates;
    for(var i=0;i<dt.length;i++) {
      if(dt[i].selected) {
        dateArray[dateArray.length] = dt[i];
      }
    }
    self.selectDates(dateArray,false,false);
    self.rows = new Array(false,false,false,false,false,false,false);
    self.cols = new Array(false,false,false,false,false,false,false);
    if(self.mode == 'popup') { //hide the calendar and clear the input element if in popup mode
      self.tgt.value = '';
      self.hide();
    }
    retMonth == true ? self.goToMonth(self.displayYearInitial,self.displayMonthInitial) : self.reDraw();
  };
  //-----------------------------------------------------------------------------
  /**
  * Reapplies all the CSS classes for the calendar cells - usually called after changing their state
  * If index is specified, it will redraw that cell only.
  * @param int index
  */
  self.reDraw = function (index) {
    self.state = 1;
    var len = index ? index + 1 : self.cells.length;
    for(var i = index || 0;i<len;i++) {
      setCellProperties(i);
    }
    self.state = 2;
  };
  //-----------------------------------------------------------------------------
  /**
  * Returns the index of the cell whose date value matches "date", or -1 if not found
  * @param Date date
  * @return int
  */
  self.getCellIndex = function(date) {
    for(var i=0;i<self.cells.length;i++) {
      if(self.cells[i].date.getUeDay() == date.getUeDay()) {
        return i;
      }
    }
    return -1;
  };
  //-----------------------------------------------------------------------------
  //begin constructor code:

  //PUBLIC VARIABLES
  self.state = 0;
  self.name = name;
  self.curDate = new Date();
  self.mode = mode;
  self.selectMultiple = (multiselect == true); //'false' if not true or not set at all
  //the various calendar variables
  self.dates = new Array();
  self.selectedDates = new Array();

  self.calendar;
  self.calHeading;
  self.calCells;
  self.rows;
  self.cols;
  self.cells = new Array();
  //The controls
  self.monthSelect;
  self.yearSelect;
  self.mousein = false;

  //Initialize the calendar and its variables{
  calConfig();
  setLang();
  setDays();
  createCalendar(); //create the calendar DOM element and its children, and their related objects
  setMode(targetelement);
  self.state = 2; //0: initializing, 1: redrawing, 2: finished!
  self.visible ? self.show() : self.hide();
}
//-----------------------------------------------------------------------------
/*****************************************************************************/
/**
* Object that contains the methods and properties for the calendar day headings
*/
function CalHeading(owner,tableCell,dayOfWeek) {
  //-----------------------------------------------------------------------------
  function DayHeadingonclick() {//selects/deselects the days for this object's day of week
    //reduce indirection:
    var sdates = owner.dates;
    var cells = owner.cells;
    var dateArray = new Array();
    owner.cols[dayOfWeek] = !owner.cols[dayOfWeek];
    for(var i=0;i<cells.length;i++) { //cycle through all the cells in the calendar, selecting all cells with the same dayOfWeek as this heading
      if(cells[i].dayOfWeek == dayOfWeek && cells[i].date.canSelect && (!owner.selCurMonthOnly || cells[i].date.getMonth() == owner.displayMonth && cells[i].date.getFullYear() == owner.displayYear)) { //if the cell's DoW matches, with other conditions
        dateArray[dateArray.length] = cells[i].date;
      }
    }
    owner.selectDates(dateArray,owner.cols[dayOfWeek],true);
  }
  //-----------------------------------------------------------------------------
  var self = this;
  self.dayOfWeek = dayOfWeek;
  addEventHandler(tableCell,'mouseup',DayHeadingonclick);
}
/*****************************************************************************/
/**
* Object that contains the methods and properties for the calendar week headings
*/
function WeekHeading(owner,tableCell,week,tableRow) {
  //-----------------------------------------------------------------------------
  function weekHeadingonclick() {
    //reduce indirection:
    var cells = owner.cells;
    var sdates = owner.dates;
    var dateArray = new Array();
    owner.rows[tableRow] = !owner.rows[tableRow];
    for(var i=0;i<cells.length;i++) {
      if(cells[i].tableRow == tableRow && cells[i].date.canSelect && (!owner.selCurMonthOnly || cells[i].date.getMonth() == owner.displayMonth && cells[i].date.getFullYear() == owner.displayYear)) { //if the cell's DoW matches, with other conditions)
        dateArray[dateArray.length] = cells[i].date;
      }
    }
    owner.selectDates(dateArray,owner.rows[tableRow],true);
  }
  //-----------------------------------------------------------------------------
  var self = this;
  self.week = week;
  tableCell.setAttribute('class','wkhead');
  tableCell.setAttribute('className','wkhead'); //<iehack>
  addEventHandler(tableCell,'mouseup',weekHeadingonclick);
}
/*****************************************************************************/
/**
* Object that holds all data & code related to a calendar cell
*/
/**
 * The CalCell constructor function
 * @param Epoch owner
 * @param HTMLTableCellElement tableCell
 * @param Date dateObj
 * @param int row
 * @param int week
 */
function CalCell(owner,tableCell,dateObj,row,week) {
  var self = this;
  //-----------------------------------------------------------------------------
  function calCellonclick() {
    if(self.date.canSelect) {
      if(owner.selectMultiple == true) { //if we can select multiple cells simultaneously, add the currently selected self's date to the dates array
        owner.selectDates(new Array(self.date),!self.date.selected,false);
        self.setClass(); //update the current cell's style to reflect the changes - a full redraw isn't necessary
      }
      else { //if we can only select one date at a time
        owner.selectDates(new Array(self.date),true,false,true);
        if(owner.mode == 'popup') { //update the target element's value and hide the calendar if in popup mode
          owner.tgt.value = self.date.dateFormat(); //use the default date format defined in dateFormat
          owner.tgt.dateObj = new Date(self.date); //add a Date object to the target element for later reference
          owner.hide();
        }
        owner.reDraw(); //redraw all the calendar cells
      }
    }
  }
  //-----------------------------------------------------------------------------
  /**
  * Replicate the CSS :hover effect for non-supporting browsers <iehack>
  */
  function calCellonmouseover() {
    if(self.date.canSelect) {
      tableCell.setAttribute('class',self.cellClass + ' hover');
      tableCell.setAttribute('className',self.cellClass + ' hover');
    }
  }
  //-----------------------------------------------------------------------------
  /**
  * Replicate the CSS :hover effect for non-supporting browsers <iehack>
  */
  function calCellonmouseout() {
    self.setClass();
  }
  //-----------------------------------------------------------------------------
  /**
  * Sets the CSS class of the cell based on the specified criteria
  */
  self.setClass = function ()
  {
    if(self.date.canSelect !== false) {
      if(self.date.selected) {
        self.cellClass = 'cell_selected';
      }
      else if(owner.displayMonth != self.date.getMonth() ) {
        self.cellClass = 'notmnth';
      }
      else if(self.date.type == 'holiday') {
        self.cellClass = 'hlday';
      }
      else if(self.dayOfWeek > 0 && self.dayOfWeek < 6) {
        self.cellClass = 'wkday';
      }
      else {
        self.cellClass = 'wkend';
      }
    }
    else {
      self.cellClass = 'noselect';
    }
    //highlight the current date
    if(self.date.getUeDay() == owner.curDate.getUeDay()) {
      self.cellClass = self.cellClass + ' curdate';
    }
    tableCell.setAttribute('class',self.cellClass);
    tableCell.setAttribute('className',self.cellClass); //<iehack>
  };
  //-----------------------------------------------------------------------------
  /**
  * Sets the cell's hyperlink, if declared
  * @param string href
  * @param string type ('anchor' or 'js' - default 'anchor')
  */
  self.setURL = function(href,type) {
    if(href) {
      if(type == 'js') { //Make the WHOLE cell be a clickable link
        addEventHandler(self.tableCell,'mousedown',function(){window.location.href = href;});
      }
      else { //make only the date number of the cell a clickable link:
        var url = document.createElement('a');
        url.setAttribute('href',href);
        url.appendChild(document.createTextNode(self.date.getDate()));
        self.tableCell.replaceChild(url,self.tableCell.firstChild); //assumes the first child of the cell DOM node is the date text
      }
    }
  }
  //-----------------------------------------------------------------------------
  /**
  * Sets the title (i.e. tooltip) that appears when a user holds their mouse cursor over a cell
  * @param string titleStr
  */
  self.setTitle = function(titleStr) {
    if(titleStr && titleStr.length > 0) {
      self.title = titleStr;
      self.tableCell.setAttribute('title',titleStr);
    }
  };
  //-----------------------------------------------------------------------------
  /**
  * Sets the internal html of the cell, using a string containing html markup
  * @param string html
  */
  self.setHTML = function(html) {
    if(html && html.length > 0) {
      if(self.tableCell.childNodes[1]) {
        self.tableCell.childNodes[1].innerHTML = html;
      }
      else {
        var htmlCont = document.createElement('div');
        htmlCont.innerHTML = html;
        self.tableCell.appendChild(htmlCont);
      }
    }
  };
  //-----------------------------------------------------------------------------
  self.cellClass;			//the CSS class of the cell
  self.tableRow = row;
  self.tableCell = tableCell;
  self.date = new Date(dateObj);
  self.date.canSelect = true; //whether this cell can be selected or not - always true unless set otherwise externally
  self.date.type = 'normal';  //i.e. normal date, holiday, etc - always true unless set otherwise externally
  self.date.selected = false;	//whether the cell is selected (and is therefore stored in the owner's dates array)
  self.date.cellHTML = '';
  self.dayOfWeek = self.date.getDay();
  self.week = week;
  //assign the event handlers for the table cell element
  addEventHandler(tableCell,'click', calCellonclick);
  addEventHandler(tableCell,'mouseover', calCellonmouseover);
  addEventHandler(tableCell,'mouseout', calCellonmouseout);
  self.setClass();
}
/*****************************************************************************/
Date.prototype.getDayOfYear = function () //returns the day of the year for this date
{
  return parseInt((this.getTime() - new Date(this.getFullYear(),0,1).getTime())/86400000 + 1);
};
//-----------------------------------------------------------------------------
/**
 * Returns the week number for this date.  dowOffset is the day of week the week
 * "starts" on for your locale - it can be from 0 to 6. If dowOffset is 1 (Monday),
 * the week returned is the ISO 8601 week number.
 * @param int dowOffset
 * @return int
 */
Date.prototype.getWeek = function (dowOffset) {
  dowOffset = typeof(dowOffset) == 'int' ? dowOffset : 0; //default dowOffset to zero
  var newYear = new Date(this.getFullYear(),0,1);
  var day = newYear.getDay() - dowOffset; //the day of week the year begins on
  day = (day >= 0 ? day : day + 7);
  var weeknum, daynum = Math.floor((this.getTime() - newYear.getTime() - (this.getTimezoneOffset()-newYear.getTimezoneOffset())*60000)/86400000) + 1;
  //if the year starts before the middle of a week
  if(day < 4) {
    weeknum = Math.floor((daynum+day-1)/7) + 1;
    if(weeknum > 52) {
      nYear = new Date(this.getFullYear() + 1,0,1);
      nday = nYear.getDay() - dowOffset;
      nday = nday >= 0 ? nday : nday + 7;
      weeknum = nday < 4 ? 1 : 53; //if the next year starts before the middle of the week, it is week #1 of that year
    }
  }
  else {
    weeknum = Math.floor((daynum+day-1)/7);
  }
  return weeknum;
};
//-----------------------------------------------------------------------------
Date.prototype.getUeDay = function () //returns the number of DAYS since the UNIX Epoch - good for comparing the date portion
{
  return parseInt(Math.floor((this.getTime() - this.getTimezoneOffset() * 60000)/86400000)); //must take into account the local timezone
};
//-----------------------------------------------------------------------------
Date.prototype.dateFormat = function(format)
{
  if(!format) { // the default date format to use - can be customized to the current locale
    format = 'd/m/Y';
  }
  LZ = function(x) {return(x < 0 || x > 9 ? '' : '0') + x};
  var MONTH_NAMES = new Array('January','February','March','April','May','June','July','August','September','October','November','December','Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
  var DAY_NAMES = new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');
  var result="";
  var i_format=0;
  var c="";
  var token="";
  var y=this.getFullYear().toString();
  var M=this.getMonth()+1;
  var d=this.getDate();
  var E=this.getDay();
  var H=this.getHours();
  var m=this.getMinutes();
  var s=this.getSeconds();
  value = {
    Y: y.toString(),
    y: y.substring(2),
    n: M,
    m: LZ(M),
    F: MONTH_NAMES[M-1],
    M: MONTH_NAMES[M+11],
    j: d,
    d: LZ(d),
    D: DAY_NAMES[E+7],
    l: DAY_NAMES[E],
    G: H,
    H: LZ(H)
  };
  if (H==0) {value['g']=12;}
  else if (H>12){value['g']=H-12;}
  else {value['g']=H;}
  value['h']=LZ(value['g']);
  if (H > 11) {value['a']='pm'; value['A'] = 'PM';}
  else { value['a']='am'; value['A'] = 'AM';}
  value['i']=LZ(m);
  value['s']=LZ(s);
  //construct the result string
  while (i_format < format.length) {
    c=format.charAt(i_format);
    token="";
    while ((format.charAt(i_format)==c) && (i_format < format.length)) {
      token += format.charAt(i_format++);
    }
    if (value[token] != null) { result=result + value[token]; }
    else { result=result + token; }
  }
  return result;
};
/*****************************************************************************/
//-----------------------------------------------------------------------------
function addEventHandler(element, type, func) { //unfortunate hack to deal with Internet Explorer's horrible DOM event model <iehack>
  if(element.addEventListener) {
    element.addEventListener(type,func,false);
  }
  else if (element.attachEvent) {
    element.attachEvent('on'+type,func);
  }
}
//-----------------------------------------------------------------------------
function removeEventHandler(element, type, func) { //unfortunate hack to deal with Internet Explorer's horrible DOM event model <iehack>
  if(element.removeEventListener) {
    element.removeEventListener(type,func,false);
  }
  else if (element.attachEvent) {
    element.detachEvent('on'+type,func);
  }
}
//-----------------------------------------------------------------------------
function getTop(element) {//returns the absolute Top value of element, in pixels
  var oNode = element;
  var iTop = 0;

  while(oNode.tagName != 'HTML') {
    iTop += oNode.offsetTop || 0;
    if(oNode.offsetParent) { //i.e. the parent element is not hidden
      oNode = oNode.offsetParent;
    }
    else {
      break;
    }
  }
  return iTop;
}
//-----------------------------------------------------------------------------
function getLeft(element) { //returns the absolute Left value of element, in pixels
  var oNode = element;
  var iLeft = 0;
  while(oNode.tagName != 'HTML') {
    iLeft += oNode.offsetLeft || 0;
    if(oNode.offsetParent) { //i.e. the parent element is not hidden
      oNode = oNode.offsetParent;
    }
    else {
      break;
    }
  }
  return iLeft;
}
//-----------------------------------------------------------------------------