<script type="text/javascript">
var bas_cal,dp_cal,ms_cal;
window.onload = function () {
dp_cal  = new Epoch('epoch_popup','popup',document.getElementById('invc_date'));
dp_cal  = new Epoch('epoch_popup','popup',document.getElementById('due_date'));
}

</script>

<INPUT id="invc_date" NAME="invc_date" TYPE="text" size="15" readonly="yes" />
<script type="text/javascript" src="../calendar.js"></script>



//////////////////////////////////////////////////calendar.js/////////////////////////

/*****************************************************************************
Copyright (C) 2006  Nick Baicoianu

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*****************************************************************************/
//constructor for the main Epoch class (ENGLISH VERSION)
function Epoch(name,mode,targetelement,multiselect)
{
  this.state = 0;
  this.name = name;
  this.curDate = new Date();
  this.mode = mode;
  this.selectMultiple = (multiselect == true); //'false' is not true or not set at all

  //the various calendar variables
  //this.selectedDate = this.curDate;
  this.selectedDates = new Array();
  this.calendar;
  this.calHeading;
  this.calCells;
  this.rows;
  this.cols;
  this.cells = new Array();

  //The controls
  this.monthSelect;
  this.yearSelect;

  //standard initializations
  this.mousein = false;
  this.calConfig();
  this.setDays();
  this.displayYear = this.displayYearInitial;
  this.displayMonth = this.displayMonthInitial;

  this.createCalendar(); //create the calendar DOM element and its children, and their related objects

  if(this.mode == 'popup' && targetelement && targetelement.type == 'text') //if the target element has been set to be an input text box
  {
    this.tgt = targetelement;
    this.calendar.style.position = 'absolute';
    this.topOffset = this.tgt.offsetHeight; // the vertical distance (in pixels) to display the calendar from the Top of its input element
    this.leftOffset = 0;           // the horizontal distance (in pixels) to display the calendar from the Left of its input element
    this.calendar.style.top = this.getTop(targetelement) + this.topOffset + 'px';
    this.calendar.style.left = this.getLeft(targetelement) + this.leftOffset + 'px';
    document.body.appendChild(this.calendar);
    this.tgt.calendar = this;
    this.tgt.onfocus = function () {this.calendar.show();}; //the calendar will popup when the input element is focused
    this.tgt.onblur = function () {if(!this.calendar.mousein){this.calendar.hide();}}; //the calendar will popup when the input element is focused
  }
  else
  {
    this.container = targetelement;
    this.container.appendChild(this.calendar);
  }

  this.state = 2; //0: initializing, 1: redrawing, 2: finished!
  this.visible ? this.show() : this.hide();
}
//-----------------------------------------------------------------------------
Epoch.prototype.calConfig = function () //PRIVATE: initialize calendar variables
{
  //this.mode = 'flat'; //can be 'flat' or 'popup'
  this.displayYearInitial = this.curDate.getFullYear(); //the initial year to display on load
  this.displayMonthInitial = this.curDate.getMonth(); //the initial month to display on load (0-11)
  this.rangeYearLower = 2005;
  this.rangeYearUpper = 2037;
  this.minDate = new Date(2005,0,1);
  this.maxDate = new Date(2037,0,1);
  this.startDay = 0; // the day the week will 'start' on: 0(Sun) to 6(Sat)
  this.showWeeks = true; //whether the week numbers will be shown
  this.selCurMonthOnly = false; //allow user to only select dates in the currently displayed month
  this.clearSelectedOnChange = true; //whether to clear all selected dates when changing months

  //flat mode-only settings:
  //this.selectMultiple = true; //whether the user can select multiple dates (flat mode only)

  switch(this.mode) //set the variables based on the calendar mode
  {
    case 'popup': //popup options
      this.visible = false;
      break;
    case 'flat':
      this.visible = true;

      break;
  }
  this.setLang();
};
//-----------------------------------------------------------------------------
Epoch.prototype.setLang = function()  //all language settings for Epoch are made here.  Check Date.dateFormat() for the Date object's language settings
{
  this.daylist = new Array('Su','Mo','Tu','We','Th','Fr','Sa','Su','Mo','Tu','We','Th','Fr','Sa'); /*<lang:en>*/
  this.months_sh = new Array('Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
  this.monthup_title = 'Go to the next month';
  this.monthdn_title = 'Go to the previous month';
  this.clearbtn_caption = 'Clear';
  this.clearbtn_title = 'Clears any dates selected on the calendar';
  this.maxrange_caption = 'This is the maximum range';
};
//-----------------------------------------------------------------------------
Epoch.prototype.getTop = function (element) //PRIVATE: returns the absolute Top value of element, in pixels
{
    var oNode = element;
    var iTop = 0;

    while(oNode.tagName != 'BODY') {
        iTop += oNode.offsetTop;
        oNode = oNode.offsetParent;
    }

    return iTop;
};
//-----------------------------------------------------------------------------
Epoch.prototype.getLeft = function (element) //PRIVATE: returns the absolute Left value of element, in pixels
{
    var oNode = element;
    var iLeft = 0;

    while(oNode.tagName != 'BODY') {
        iLeft += oNode.offsetLeft;
        oNode = oNode.offsetParent;
    }

    return iLeft;
};
//-----------------------------------------------------------------------------
Epoch.prototype.show = function () //PUBLIC: displays the calendar
{
  this.calendar.style.display = 'block';
  this.visible = true;
};
//-----------------------------------------------------------------------------
Epoch.prototype.hide = function () //PUBLIC: Hides the calendar
{
  this.calendar.style.display = 'none';
  this.visible = false;
};
//-----------------------------------------------------------------------------
Epoch.prototype.toggle = function () //PUBLIC: Toggles (shows/hides) the calendar depending on its current state
{
  if(this.visible) {
    this.hide();
  }
  else {
    this.show();
  }
};
//-----------------------------------------------------------------------------
Epoch.prototype.setDays = function ()  //PRIVATE: initializes the standard Gregorian Calendar parameters
{
  this.daynames = new Array();
  var j=0;
  for(var i=this.startDay; i< this.startDay + 7;i++) {
    this.daynames[j++] = this.daylist[i];
  }

  this.monthDayCount = new Array(31,((this.curDate.getFullYear() - 2000) % 4 ? 28 : 29),31,30,31,30,31,31,30,31,30,31);
};
//-----------------------------------------------------------------------------
Epoch.prototype.setClass = function (element,className) //PRIVATE: sets the CSS class of the element, W3C & IE
{
  element.setAttribute('class',className);
  element.setAttribute('className',className); //<iehack>
};
//-----------------------------------------------------------------------------
Epoch.prototype.createCalendar = function ()  //PRIVATE: creates the full DOM implementation of the calendar
{
  var tbody, tr, td;
  this.calendar = document.createElement('table');
  this.calendar.setAttribute('id',this.name+'_calendar');
  this.setClass(this.calendar,'calendar');
  //to prevent IE from selecting text when clicking on the calendar
  this.calendar.onselectstart = function() {return false;};
  this.calendar.ondrag = function() {return false;};
  tbody = document.createElement('tbody');

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

  //create the calendar Day Heading
  tr = document.createElement('tr');
  td = document.createElement('td');
  td.appendChild(this.createDayHeading());
  tr.appendChild(td);
  tbody.appendChild(tr);

  //create the calendar Day Cells
  tr = document.createElement('tr');
  td = document.createElement('td');
  td.setAttribute('id',this.name+'_cell_td');
  this.calCellContainer = td;  //used as a handle for manipulating the calendar cells as a whole
  td.appendChild(this.createCalCells());
  tr.appendChild(td);
  tbody.appendChild(tr);

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

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

  //and add the onmouseover events to the calendar table
  this.calendar.owner = this;
  this.calendar.onmouseover = function() {this.owner.mousein = true;};
  this.calendar.onmouseout = function() {this.owner.mousein = false;};
};
//-----------------------------------------------------------------------------
Epoch.prototype.createMainHeading = function () //PRIVATE: Creates the primary calendar heading, with months & years
{
  //create the containing <div> element
  var container = document.createElement('div');
  container.setAttribute('id',this.name+'_mainheading');
  this.setClass(container,'mainheading');
  //create the child elements and other variables
  this.monthSelect = document.createElement('select');
  this.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(this.state == 0 && this.displayMonth == i) {
      opt.setAttribute('selected','selected');
    }
    opt.appendChild(document.createTextNode(this.months_sh[i]));
    this.monthSelect.appendChild(opt);
  }
  //and fill the year select box
  for(i=this.rangeYearLower;i<=this.rangeYearUpper;i++)
  {
    opt = document.createElement('option');
    opt.setAttribute('value',i);
    if(this.state == 0 && this.displayYear == i) {
      opt.setAttribute('selected','selected');
    }
    opt.appendChild(document.createTextNode(i));
    this.yearSelect.appendChild(opt);
  }
  //add the appropriate children for the month buttons
  monthUp.setAttribute('type','button');
  monthUp.setAttribute('value','>');
  monthUp.setAttribute('title',this.monthup_title);
  monthDn.setAttribute('type','button');
  monthDn.setAttribute('value','<');
  monthDn.setAttribute('title',this.monthdn_title);
  this.monthSelect.owner = this.yearSelect.owner = monthUp.owner = monthDn.owner = this;  //hack to allow us to access this calendar in the events (<fix>??)

  //assign the event handlers for the controls
  monthUp.onmouseup = function () {this.owner.nextMonth();};
  monthDn.onmouseup = function () {this.owner.prevMonth();};
  this.monthSelect.onchange = function() {
    this.owner.displayMonth = this.value;
    this.owner.displayYear = this.owner.yearSelect.value;
    this.owner.goToMonth(this.owner.displayYear,this.owner.displayMonth);
  };
  this.yearSelect.onchange = function() {
    this.owner.displayMonth = this.owner.monthSelect.value;
    this.owner.displayYear = this.value;
    this.owner.goToMonth(this.owner.displayYear,this.owner.displayMonth);
  };

  //and finally add the elements to the containing div
  container.appendChild(monthDn);
  container.appendChild(this.monthSelect);
  container.appendChild(this.yearSelect);
  container.appendChild(monthUp);
  return container;
};
//-----------------------------------------------------------------------------
Epoch.prototype.createFooter = function () //PRIVATE: creates the footer of the calendar - goes under the calendar cells
{
  var container = document.createElement('div');
  var clearSelected = document.createElement('input');
  clearSelected.setAttribute('type','button');
  clearSelected.setAttribute('value',this.clearbtn_caption);
  clearSelected.setAttribute('title',this.clearbtn_title);
  clearSelected.owner = this;
  clearSelected.onclick = function() { this.owner.resetSelections(false);};
  container.appendChild(clearSelected);
  return container;
};
//-----------------------------------------------------------------------------
Epoch.prototype.resetSelections = function (returnToDefaultMonth)  //PRIVATE: reset the calendar's selection variables to defaults
{
  this.selectedDates = new Array();
  this.rows = new Array(false,false,false,false,false,false,false);
  this.cols = new Array(false,false,false,false,false,false,false);
  if(this.tgt)  //if there is a target element, clear it too
  {
    this.tgt.value = '';
    if(this.mode == 'popup') {//hide the calendar if in popup mode
      this.hide();
    }
  }

  if(returnToDefaultMonth == true) {
    this.goToMonth(this.displayYearInitial,this.displayMonthInitial);
  }
  else {
    this.reDraw();
  }
};
//-----------------------------------------------------------------------------
Epoch.prototype.createDayHeading = function ()  //PRIVATE: creates the heading containing the day names
{
  //create the table element
  this.calHeading = document.createElement('table');
  this.calHeading.setAttribute('id',this.name+'_caldayheading');
  this.setClass(this.calHeading,'caldayheading');
  var tbody,tr,td;
  tbody = document.createElement('tbody');
  tr = document.createElement('tr');
  this.cols = new Array(false,false,false,false,false,false,false);

  //if we're showing the week headings, create an empty <td> for filler
  if(this.showWeeks)
  {
    td = document.createElement('td');
    td.setAttribute('class','wkhead');
    td.setAttribute('className','wkhead'); //<iehack>
    tr.appendChild(td);
  }
  //populate the day titles
  for(var dow=0;dow<7;dow++)
  {
    td = document.createElement('td');
    td.appendChild(document.createTextNode(this.daynames[dow]));
    if(this.selectMultiple) { //if selectMultiple is true, assign the cell a CalHeading Object to handle all events
      td.headObj = new CalHeading(this,td,(dow + this.startDay < 7 ? dow + this.startDay : dow + this.startDay - 7));
    }
    tr.appendChild(td);
  }
  tbody.appendChild(tr);
  this.calHeading.appendChild(tbody);
  return this.calHeading;
};
//-----------------------------------------------------------------------------
Epoch.prototype.createCalCells = function ()  //PRIVATE: creates the table containing the calendar day cells
{
  this.rows = new Array(false,false,false,false,false,false);
  this.cells = new Array();
  var row = -1, totalCells = (this.showWeeks ? 48 : 42);
  var beginDate = new Date(this.displayYear,this.displayMonth,1);
  var endDate = new Date(this.displayYear,this.displayMonth,this.monthDayCount[this.displayMonth]);
  var sdt = new Date(beginDate);
  sdt.setDate(sdt.getDate() + (this.startDay - beginDate.getDay()) - (this.startDay - beginDate.getDay() > 0 ? 7 : 0) );
  //create the table element
  this.calCells = document.createElement('table');
  this.calCells.setAttribute('id',this.name+'_calcells');
  this.setClass(this.calCells,'calcells');
  var tbody,tr,td;
  tbody = document.createElement('tbody');
  for(var i=0;i<totalCells;i++)
  {
    if(this.showWeeks) //if we are showing the week headings
    {
      if(i % 8 == 0)
      {
        row++;
        tr = document.createElement('tr');
        td = document.createElement('td');
        if(this.selectMultiple) { //if selectMultiple is enabled, create the associated weekObj objects
          td.weekObj = new WeekHeading(this,td,sdt.getWeek(),row)
        }
        else //otherwise just set the class of the td for consistent look
        {
          td.setAttribute('class','wkhead');
          td.setAttribute('className','wkhead'); //<iehack>
        }
        td.appendChild(document.createTextNode(sdt.getWeek()));
        tr.appendChild(td);
        i++;
      }
    }
    else if(i % 7 == 0) //otherwise, new row every 7 cells
    {
      row++;
      tr = document.createElement('tr');
    }
    //create the day cells
    td = document.createElement('td');
    td.appendChild(document.createTextNode(sdt.getDate()));// +' ' +sdt.getUeDay()));
    var cell = new CalCell(this,td,sdt,row);
    this.cells.push(cell);
    td.cellObj = cell;
    sdt.setDate(sdt.getDate() + 1); //increment the date
    tr.appendChild(td);
    tbody.appendChild(tr);
  }
  this.calCells.appendChild(tbody);
  this.reDraw();
  return this.calCells;
};
//-----------------------------------------------------------------------------
Epoch.prototype.reDraw = function () //PRIVATE: reapplies all the CSS classes for the calendar cells, usually called after chaning their state
{
  this.state = 1;
  var i,j;
  for(i=0;i<this.cells.length;i++) {
    this.cells[i].selected = false;
  }
  for(i=0;i<this.cells.length;i++)
  {
    for(j=0;j<this.selectedDates.length;j++) { //if the cell's date is in the selectedDates array, set its selected property to true
      if(this.cells[i].date.getUeDay() == this.selectedDates[j].getUeDay() ) {
        this.cells[i].selected = true;
      }
    }

    this.cells[i].setClass();
  }
  //alert(this.selectedDates);
  this.state = 2;
};
//-----------------------------------------------------------------------------
Epoch.prototype.deleteCells = function () //PRIVATE: removes the calendar cells from the DOM (does not delete the cell objects associated with them
{
  this.calCellContainer.removeChild(this.calCellContainer.firstChild); //get a handle on the cell table (optional - for less indirection)
  this.cells = new Array(); //reset the cells array
};
//-----------------------------------------------------------------------------
Epoch.prototype.goToMonth = function (year,month) //PUBLIC: sets the calendar to display the requested month/year
{
  this.monthSelect.value = this.displayMonth = month;
  this.yearSelect.value = this.displayYear = year;
  this.deleteCells();
  this.calCellContainer.appendChild(this.createCalCells());
};
//-----------------------------------------------------------------------------
Epoch.prototype.nextMonth = function () //PUBLIC: go to the next month.  if the month is december, go to january of the next year
{

  //increment the month/year values, provided they're within the min/max ranges
  if(this.monthSelect.value < 11) {
    this.monthSelect.value++;
  }
  else
  {
    if(this.yearSelect.value < this.rangeYearUpper)
    {
      this.monthSelect.value = 0;
      this.yearSelect.value++;
    }
    else {
      alert(this.maxrange_caption);
    }
  }
  //assign the currently displaying month/year values
  this.displayMonth = this.monthSelect.value;
  this.displayYear = this.yearSelect.value;

  //and refresh the calendar for the new month/year
  this.deleteCells();
  this.calCellContainer.appendChild(this.createCalCells());
};
//-----------------------------------------------------------------------------
Epoch.prototype.prevMonth = function () //PUBLIC: go to the previous month.  if the month is january, go to december of the previous year
{
  //increment the month/year values, provided they're within the min/max ranges
  if(this.monthSelect.value > 0)
    this.monthSelect.value--;
  else
  {
    if(this.yearSelect.value > this.rangeYearLower)
    {
      this.monthSelect.value = 11;
      this.yearSelect.value--;
    }
    else {
      alert(this.maxrange_caption);
    }
  }

  //assign the currently displaying month/year values
  this.displayMonth = this.monthSelect.value;
  this.displayYear = this.yearSelect.value;

  //and refresh the calendar for the new month/year
  this.deleteCells();
  this.calCellContainer.appendChild(this.createCalCells());
};
//-----------------------------------------------------------------------------
Epoch.prototype.addZero = function (vNumber) //PRIVATE: pads a 2 digit number with a leading zero
{
  return ((vNumber < 10) ? '0' : '') + vNumber;
};
//-----------------------------------------------------------------------------
Epoch.prototype.addDates = function (dates,redraw)  //PUBLIC: adds the array "dates" to the calendars selectedDates array (no duplicate dates) and redraws the calendar
{
  var j,in_sd;
  for(var i=0;i<dates.length;i++)
  {
    in_sd = false;
    for(j=0;j<this.selectedDates.length;j++)
    {
      if(dates[i].getUeDay() == this.selectedDates[j].getUeDay())
      {
        in_sd = true;
        break;
      }
    }
    if(!in_sd) { //if the date isn't already in the array, add it!
      this.selectedDates.push(dates[i]);
    }
  }
  if(redraw != false) {//redraw  the calendar if "redraw" is false or undefined
    this.reDraw();
  }
};
//-----------------------------------------------------------------------------
Epoch.prototype.removeDates = function (dates,redraw)  //PUBLIC: adds the dates to the calendars selectedDates array and redraws the calendar
{
  var j;
  for(var i=0;i<dates.length;i++)
  {
    for(j=0;j<this.selectedDates.length;j++)
    {
      if(dates[i].getUeDay() == this.selectedDates[j].getUeDay()) { //search for the dates in the selectedDates array, removing them if the dates match
        this.selectedDates.splice(j,1);
      }
    }
  }
  if(redraw != false) { //redraw  the calendar if "redraw" is false or undefined
    this.reDraw();
  }
};
//-----------------------------------------------------------------------------
Epoch.prototype.outputDate = function (vDate, vFormat) //PUBLIC: outputs a date in the appropriate format (DEPRECATED)
{
  var vDay      = this.addZero(vDate.getDate());
  var vMonth      = this.addZero(vDate.getMonth() + 1);
  var vYearLong    = this.addZero(vDate.getFullYear());
  var vYearShort    = this.addZero(vDate.getFullYear().toString().substring(3,4));
  var vYear      = (vFormat.indexOf('yyyy') > -1 ? vYearLong : vYearShort);
  var vHour      = this.addZero(vDate.getHours());
  var vMinute      = this.addZero(vDate.getMinutes());
  var vSecond      = this.addZero(vDate.getSeconds());
  return vFormat.replace(/dd/g, vDay).replace(/mm/g, vMonth).replace(/y{1,4}/g, vYear).replace(/hh/g, vHour).replace(/nn/g, vMinute).replace(/ss/g, vSecond);
};
//----------------------------------------------------------------------------
Epoch.prototype.updatePos = function (target) //PUBLIC: moves the calendar's position to target's location (popup mode only)
{
  this.calendar.style.top = this.getTop(target) + this.topOffset + 'px'
  this.calendar.style.left = this.getLeft(target) + this.leftOffset + 'px'
}
//-----------------------------------------------------------------------------

/*****************************************************************************/
function CalHeading(owner,tableCell,dow)
{
  this.owner = owner;
  this.tableCell = tableCell;
  this.dayOfWeek = dow;

  //the event handlers
  this.tableCell.onclick = this.onclick;
}
//-----------------------------------------------------------------------------
CalHeading.prototype.onclick = function ()
{
  //reduce indirection:
  var owner = this.headObj.owner;
  var sdates = owner.selectedDates;
  var cells = owner.cells;

  owner.cols[this.headObj.dayOfWeek] = !owner.cols[this.headObj.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 == this.headObj.dayOfWeek && (!owner.selCurMonthOnly || cells[i].date.getMonth() == owner.displayMonth && cells[i].date.getFullYear() == owner.displayYear)) //if the cell's DoW matches, with other conditions
    {
      if(owner.cols[this.headObj.dayOfWeek])     //if selecting, add the cell's date to the selectedDates array
      {
        if(owner.selectedDates.arrayIndex(cells[i].date) == -1) { //if the date isn't already in the array
          sdates.push(cells[i].date);
        }
      }
      else                    //otherwise, remove it
      {
        for(var j=0;j<sdates.length;j++)
        {
          if(cells[i].dayOfWeek == sdates[j].getDay())
          {
            sdates.splice(j,1);  //remove dates that are within the displaying month/year that have the same day of week as the day cell
            break;
          }
        }
      }
      cells[i].selected = owner.cols[this.headObj.dayOfWeek];
    }
  }
  owner.reDraw();
};
/*****************************************************************************/
function WeekHeading(owner,tableCell,week,row)
{
  this.owner = owner;
  this.tableCell = tableCell;
  this.week = week;
  this.tableRow = row;
  this.tableCell.setAttribute('class','wkhead');
  this.tableCell.setAttribute('className','wkhead'); //<iehack>
  //the event handlers
  this.tableCell.onclick = this.onclick;
}
//-----------------------------------------------------------------------------
WeekHeading.prototype.onclick = function ()
{
  //reduce indirection:
  var owner = this.weekObj.owner;
  var cells = owner.cells;
  var sdates = owner.selectedDates;
  var i,j;
  owner.rows[this.weekObj.tableRow] = !owner.rows[this.weekObj.tableRow];
  for(i=0;i<cells.length;i++)
  {
    if(cells[i].tableRow == this.weekObj.tableRow)
    {
      if(owner.rows[this.weekObj.tableRow] && (!owner.selCurMonthOnly || cells[i].date.getMonth() == owner.displayMonth && cells[i].date.getFullYear() == owner.displayYear)) //match all cells in the current row, with option to restrict to current month only
      {
        if(owner.selectedDates.arrayIndex(cells[i].date) == -1) {//if the date isn't already in the array
          sdates.push(cells[i].date);
        }
      }
      else                    //otherwise, remove it
      {
        for(j=0;j<sdates.length;j++)
        {
          if(sdates[j].getTime() == cells[i].date.getTime())  //this.weekObj.tableRow && sdates[j].getMonth() == owner.displayMonth && sdates[j].getFullYear() == owner.displayYear)
          {
            sdates.splice(j,1);  //remove dates that are within the displaying month/year that have the same day of week as the day cell
            break;
          }
        }
      }
    }
  }
  owner.reDraw();
};
/*****************************************************************************/
//-----------------------------------------------------------------------------
function CalCell(owner,tableCell,dateObj,row)
{
  this.owner = owner;    //used primarily for event handling
  this.tableCell = tableCell;       //the link to this cell object's table cell in the DOM
  this.cellClass;      //the CSS class of the cell
  this.selected = false;  //whether the cell is selected (and is therefore stored in the owner's selectedDates array)
  this.date = new Date(dateObj);
  this.dayOfWeek = this.date.getDay();
  this.week = this.date.getWeek();
  this.tableRow = row;

  //assign the event handlers for the table cell element
  this.tableCell.onclick = this.onclick;
  this.tableCell.onmouseover = this.onmouseover;
  this.tableCell.onmouseout = this.onmouseout;

  //and set the CSS class of the table cell
  this.setClass();
}
//-----------------------------------------------------------------------------
CalCell.prototype.onmouseover = function () //replicate CSS :hover effect for non-supporting browsers <iehack>
{
  this.setAttribute('class',this.cellClass + ' hover');
  this.setAttribute('className',this.cellClass + ' hover');
};
//-----------------------------------------------------------------------------
CalCell.prototype.onmouseout = function () //replicate CSS :hover effect for non-supporting browsers <iehack>
{
  this.cellObj.setClass();
};
//-----------------------------------------------------------------------------
CalCell.prototype.onclick = function ()
{
  //reduce indirection:
  var cell = this.cellObj;
  var owner = cell.owner;
  if(!owner.selCurMonthOnly || cell.date.getMonth() == owner.displayMonth && cell.date.getFullYear() == owner.displayYear)
  {
    if(owner.selectMultiple == true)  //if we can select multiple cells simultaneously, add the currently selected cell's date to the selectedDates array
    {
      if(!cell.selected) //if this cell has been selected
      {
        if(owner.selectedDates.arrayIndex(cell.date) == -1) {
          owner.selectedDates.push(cell.date);
        }
      }
      else
      {
        var tmp = owner.selectedDates; // to reduce indirection
        //if the cell has been deselected, remove it from the owner calendar's selectedDates array
        for(var i=0;i<tmp.length;i++)
        {
          if(tmp[i].getUeDay() == cell.date.getUeDay()) {
            tmp.splice(i,1);
          }
        }
      }
    }
    else //if we can only select one cell at a time
    {
      owner.selectedDates = new Array(cell.date);
      if(owner.tgt) //if there is a target element to place the value in, do so
      {
        owner.tgt.value = owner.selectedDates[0].dateFormat();
        if(owner.mode == 'popup') {
          owner.hide();
        }
      }
    }
    owner.reDraw(); //redraw the calendar cell styles to reflect the changes
  }
};
//-----------------------------------------------------------------------------
CalCell.prototype.setClass = function ()  //private: sets the CSS class of the cell based on the specified criteria
{
  if(this.selected) {
    this.cellClass = 'cell_selected';
  }
  else if(this.owner.displayMonth != this.date.getMonth() ) {
    this.cellClass = 'notmnth';
  }
  else if(this.date.getDay() > 0 && this.date.getDay() < 6) {
    this.cellClass = 'wkday';
  }
  else {
    this.cellClass = 'wkend';
  }

  if(this.date.getFullYear() == this.owner.curDate.getFullYear() && this.date.getMonth() == this.owner.curDate.getMonth() && this.date.getDate() == this.owner.curDate.getDate()) {
    this.cellClass = this.cellClass + ' curdate';
  }

  this.tableCell.setAttribute('class',this.cellClass);
  this.tableCell.setAttribute('className',this.cellClass); //<iehack>
};
/*****************************************************************************/
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);
};
//-----------------------------------------------------------------------------
Date.prototype.getWeek = function () //returns the day of the year for this date
{
  return parseInt((this.getTime() - new Date(this.getFullYear(),0,1).getTime())/604800000 + 1);
};
/*function getISOWeek()
{
  var newYear = new Date(this.getFullYear(),0,1);
  var modDay = newYear.getDay();
  if (modDay == 0) modDay=6; else modDay--;

  var daynum = ((Date.UTC(this.getFullYear(),this.getMonth(),this.getDate(),0,0,0) - Date.UTC(this.getFullYear()),0,1,0,0,0)) /1000/60/60/24) + 1;

  if (modDay < 4 ) {
      var weeknum = Math.floor((daynum+modDay-1)/7)+1;
  }
  else {
      var weeknum = Math.floor((daynum+modDay-1)/7);
      if (weeknum == 0) {
          year--;
          var prevNewYear = new Date(this.getFullYear(),0,1);
          var prevmodDay = prevNewYear.getDay();
          if (prevmodDay == 0) prevmodDay = 6; else prevmodDay--;
          if (prevmodDay < 4) weeknum = 53; else weeknum = 52;
      }
  }

  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');
  format = format + "";
  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();
  var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,H,KK,K,kk,k;
  // Convert real this parts into formatted versions
  var value = new Object();
  //if (y.length < 4) {y=''+(y-0+1900);}
  value['Y'] = y.toString();
  value['y'] = y.substring(2);
  value['n'] = M;
  value['m'] = LZ(M);
  value['F'] = MONTH_NAMES[M-1];
  value['M'] = MONTH_NAMES[M+11];
  value['j'] = d;
  value['d'] = LZ(d);
  value['D'] = DAY_NAMES[E+7];
  value['l'] = DAY_NAMES[E];
  value['G'] = H;
  value['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;
};
/*****************************************************************************/
Array.prototype.arrayIndex = function(searchVal,startIndex) //similar to array.indexOf() - created to fix IE deficiencies
{
  startIndex = (startIndex != null ? startIndex : 0); //default startIndex to 0, if not set
  for(var i=startIndex;i<this.length;i++)
  {
    if(searchVal == this[i]) {
      return i;
    }
  }
  return -1;
};