Hi All,

i'm new to javascript and i'm struggeling with a calendar control that i have configured in my page.

my form contains 5 readonly date fields, for which i have implemented EPOCH Calendar control. The control works perfectly, except i need to do some validations for these fields. 2 date fields must not take a future date, and all of them must be validated against each other to compare larger and smaller values. how can i do that in calendar.js as i'm little reluctant to mess with the EPOCH code.

The code is below for your reference, and calendar function is called on page load event.

calendar.js
---------------------------------------------------------
// JavaScript Document

/*****************************************************************************
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 = 1950;
this.rangeYearUpper = 2050;
this.minDate = new Date(1950,0,1);
this.maxDate = new Date(2050,0,1);
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 = 'm/d/Y';
format = 'Y-m-d';
}
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;
};
/*****************************************************************************/


function getCal() {
var bas_cal,dp_cal1,ms_cal, dp_cal2, dp_cal3, dp_cal4, dp_cal5;
dp_cal1 = new Epoch('epoch_popup','popup',document.getElementById('dob'));
dp_cal2 = new Epoch('epoch_popup','popup',document.getElementById('pissue'));
dp_cal3 = new Epoch('epoch_popup','popup',document.getElementById('pexpiry'));
dp_cal4 = new Epoch('epoch_popup','popup',document.getElementById('vissuedate'));
dp_cal5 = new Epoch('epoch_popup','popup',document.getElementById('vexpirydate'));
}
-----------------------------------------------------------


please help me with this ..

Regards
Maryam