//-----------------------date validation-------------------
	var dtCh= "/";
	var minYear=1900;
	var maxYear=2100;
	function isNumber(s)
	{
		var i;
		for (i = 0; i < s.length; i++)
		{
			// Check that current character is number.
			var c = s.charAt(i);
			if (c != ".")
			{
				if (((c < "0") || (c > "9"))) return false;
			}
		}
		// All characters are numbers.
		return true;
	}

	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 is_date(dtStr)
	{
		var daysInMonth = DaysArray(12);
		var pos1=dtStr.indexOf(dtCh)
		var pos2=dtStr.indexOf(dtCh,pos1+1)
		var strDay=dtStr.substring(0,pos1)
		var strMonth=dtStr.substring(pos1+1,pos2)
		var strYear=dtStr.substring(pos2+1)
		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)
		day=parseInt(strDay)
		year=parseInt(strYr)
		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 ((strYear.length != 4 && strYear.length != 2) || year==0 )
		{
				alert("Please enter a valid year.")
				return false
		}
		if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false)
		{
				alert("Please enter a valid date")
				return false
		}
		return true
	}