var dtCh= "-";
var minYear=2007;
var maxYear=2200;
var dtStr = "";

function getInputObj(name,id) {
	//alert(id);
	return eval("document.all."+name+"_AuthoringModeControlsContainer_"+id);
}
function InitActions(){

	var EStartDate = getInputObj("EventStartDate","textbox");
	var PoEventFrom = getInputObj("PostEventFrom","textbox");
	var PrevEventFrom = getInputObj("PreviousEventFrom","textbox");
	var PrevEventTo = getInputObj("PreviousEventTo","textbox");
	var EEndDate = getInputObj("EventEndDate","textbox");
	var PoEventTo = getInputObj("PostEventTo","textbox");

	if (EStartDate)
	{
		EStartDate.onkeyup = ValidateForm1;	
	}
	if (PoEventFrom)
	{
		PoEventFrom.onkeyup = ValidateForm2;	
	}
	if (PrevEventFrom)
	{
		PrevEventFrom.onkeyup = ValidateForm3;	
	}
	if (PrevEventTo)
	{
		PrevEventTo.onkeyup = ValidateForm4;	
	}
	if (EEndDate)
	{
		EEndDate.onkeyup = ValidateForm5;	
	}
	if (PoEventTo)
	{
		PoEventTo.onkeyup = ValidateForm6;	
	}
	
	
}

function ValidateForm1(){
var EStartDate = getInputObj("EventStartDate","textbox")
dtStr = EStartDate.value;
isDate();
 }
function ValidateForm2(){
var PoEventFrom = getInputObj("PostEventFrom","textbox");
dtStr = PoEventFrom.value;
isDate();
 }
function ValidateForm3(){
var PrevEventFrom = getInputObj("PreviousEventFrom","textbox");
dtStr = PrevEventFrom.value;
isDate();
 }
function ValidateForm4(){
var PrevEventTo = getInputObj("PreviousEventTo","textbox");
dtStr = PrevEventTo.value;
isDate();
 }
function ValidateForm5(){
var EEndDate = getInputObj("EventEndDate","textbox");
dtStr = EEndDate.value;
isDate();
 }
function ValidateForm6(){
var PoEventTo = getInputObj("PostEventTo","textbox");
dtStr = PoEventTo.value;
isDate();
 }

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this
}

function isDate(){
if(dtStr.length > 9)
{
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)

	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strDay=dtStr.substring(0,pos1)
	//alert("strDay= "+strDay);
	var strMonth=dtStr.substring(pos1+1,pos2)
	//alert("strMonth= "+strMonth);
	var strYear=dtStr.substring(pos2+1)
	//alert("strYear= "+strYear);
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	//alert("month= "+month);
	day=parseInt(strDay)
	//alert("day= "+day);
	year=parseInt(strYr)
	//alert("year= "+year);
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : dd-mm-yyyy")
		return false;
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false;
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false;
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false;
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false;
	}
return true
}
}