/*
	This code is for the 2 digit to 4 digit conversion. It will also
	convert any date formats that are not in the mm/dd/yyyy
	format. If a date format is entered incorrectly -- a dialog box
	will pop up to alert the user.
*/
<!-- // Begin

function checkdate(objName) {
	var datefield = objName;
	if (chkdate(objName) == false) {
		datefield.select();
		alert("That date is invalid. Please try again.");
		datefield.focus();
		return false;
	} else {
		return true;
	}
}

function chkdate(objName) {
	var strDatestyle = "US"; //United States date style
	//var strDatestyle = "EU"; //European date style
	var strDate;
	var strDateArray;
	var strDay;
	var strMonth;
	var strYear;
	var intday;
	var intMonth;
	var intYear;
	var booFound = false;
	var datefield = objName;
	var strSeparatorArray = new Array("-"," ","/",".");
	var intElementNr;
	var err = 0;
	var strMonthArray = new Array(12);
/*
	strMonthArray[0] = "Jan";
	strMonthArray[1] = "Feb";
	strMonthArray[2] = "Mar";
	strMonthArray[3] = "Apr";
	strMonthArray[4] = "May";
	strMonthArray[5] = "Jun";
	strMonthArray[6] = "Jul";
	strMonthArray[7] = "Aug";
	strMonthArray[8] = "Sep";
	strMonthArray[9] = "Oct";
	strMonthArray[10] = "Nov";
	strMonthArray[11] = "Dec";
*/
	strMonthArray[0] = "01";
	strMonthArray[1] = "02";
	strMonthArray[2] = "03";
	strMonthArray[3] = "04";
	strMonthArray[4] = "05";
	strMonthArray[5] = "06";
	strMonthArray[6] = "07";
	strMonthArray[7] = "08";
	strMonthArray[8] = "09";
	strMonthArray[9] = "10";
	strMonthArray[10] = "11";
	strMonthArray[11] = "12";
	strDate = datefield.value;

//alert('strDate.length = ' + strDate.length);

//	if (strDate.length > 0) {
	if (strDate.length < 1) {
		return false;
//		return true;
	}

	//check for valid characters
	var strValidChars = "0123456789.-/ ";
	for (iValid = 0; iValid < strDate.length; iValid++) {
		var strChar = strDate.charAt(iValid);

		if (strValidChars.indexOf(strChar) == -1) {
			return false;
		}
	}

	for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
		if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
			strDateArray = strDate.split(strSeparatorArray[intElementNr]);
			if (strDateArray.length != 3) {
				Err = 1;
				return false;
			} else {
				strDay = strDateArray[0];
				strMonth = strDateArray[1];
				strYear = strDateArray[2];
			}
			booFound = true;
		}
	}

	if (booFound == false) {
		if (strDate.length>5) {
			strDay = strDate.substr(0, 2);
			strMonth = strDate.substr(2, 2);
			strYear = strDate.substr(4);
 		} else {
			return false;
		}
	}

	if (strYear.length == 2) {
		strYear = '20' + strYear;
	}

	if (strYear.length == 1) {
		strYear = '200' + strYear;
	}

	// US style
	if (strDatestyle == "US") {
		strTemp = strDay;
		strDay = strMonth;
		strMonth = strTemp;
	}

	intday = parseInt(strDay, 10);

	if (isNaN(intday)) {
		Err = 2;
		return false;
	}

	intMonth = parseInt(strMonth, 10);

	if (isNaN(intMonth)) {
		for (i = 0;i<12;i++) {
			if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
				intMonth = i+1;
				strMonth = strMonthArray[i];
				i = 12;
			}
		}

		if (isNaN(intMonth)) {
			Err = 3;
			return false;
		}
	}

	intYear = parseInt(strYear, 10);

	if (isNaN(intYear)) {
		Err = 4;
		return false;
	}

	if (intMonth>12 || intMonth<1) {
		Err = 5;
		return false;
	}

	if (
		(intMonth == 1
		|| intMonth == 3
		|| intMonth == 5
		|| intMonth == 7
		|| intMonth == 8
		|| intMonth == 10
		|| intMonth == 12) && (intday > 31 || intday < 1)
	) {
		Err = 6;
		return false;
	}

	if (
		(intMonth == 4 
		|| intMonth == 6 
		|| intMonth == 9 
		|| intMonth == 11) && (intday > 30 || intday < 1)
	) {
		Err = 7;
		return false;
	}

	if (intMonth == 2) {
		if (intday < 1) {
			Err = 8;
			return false;
		}

		if (LeapYear(intYear) == true) {
			if (intday > 29) {
				Err = 9;
				return false;
			}
		} else {
			if (intday > 28) {
				Err = 10;
				return false;
			}
		}
	}

	if (strDatestyle == "US") {
		datefield.value = strMonthArray[intMonth-1] + "/" + intday+"/" + strYear;
	} else {
		datefield.value = intday + "/" + strMonthArray[intMonth-1] + "/" + strYear;
	}
/*
		datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;
	} else {
		datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;
	}
*/
	return true;
}

function LeapYear(intYear) {
	if (intYear % 100 == 0) {
		if (intYear % 400 == 0) { return true; }
	} else {
		if ((intYear % 4) == 0) { return true; }
	}

	return false;
}
// End -->