var isNav4 = false, isNav5 = false, isIE4 = false
		var strSeperator = "-";

		var vDateType = 3;

		var vYearType = 4;
		var vYearLength = 2;
		var err = 0;
		if(navigator.appName == "Netscape") {
		if (navigator.appVersion < "5") {
		isNav4 = true;
		isNav5 = false;
		}
		else
		if (navigator.appVersion > "4") {
		isNav4 = false;
		isNav5 = true;
		   }
		}
		else {
		isIE4 = true;
		}
		function DateFormat(vDateName, vDateValue, e, dateCheck, dateType) {
		vDateType = dateType;
		if (vDateValue == "~") {
		alert("AppVersion = "+navigator.appVersion+" \nNav. 4 Version = "+isNav4+" \nNav. 5 Version = "+isNav5+" \nIE Version = "+isIE4+" \nYear Type = "+vYearType+" \nDate Type = "+vDateType+" \nSeparator = "+strSeperator);
		vDateName.value = "";
		vDateName.focus();
		return true;
		}
		var whichCode = (window.Event) ? e.which : e.keyCode;

		if (vDateValue.length > 8 && isNav4) {
		if ((vDateValue.indexOf("-") >= 1) || (vDateValue.indexOf("/") >= 1))
		return true;
		}
		//Eliminate all the ASCII codes that are not valid
		var alphaCheck = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/-";
		if (alphaCheck.indexOf(vDateValue) >= 1) {
		if (isNav4) {
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
		}
		else {
		vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
		return false;
		   }
		}
		if (whichCode == 8) //Ignore the Netscape value for backspace. IE has no value
		return false;
		else {
		//Create numeric string values for 0123456789/
		//The codes provided include both keyboard and keypad values
		var strCheck = '47,48,49,50,51,52,53,54,55,56,57,58,59,95,96,97,98,99,100,101,102,103,104,105';
		if (strCheck.indexOf(whichCode) != -1) {
		if (isNav4) {
		if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1)) {
		alert("Invalid Date\nPlease Re-Enter");
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
		}
		if (vDateValue.length == 6 && dateCheck) {
		var mDay = vDateName.value.substr(2,2);
		var mMonth = vDateName.value.substr(0,2);
		var mYear = vDateName.value.substr(4,4)
		//Turn a two digit year into a 4 digit year
		if (mYear.length == 2 && vYearType == 4) {
		var mToday = new Date();
		//If the year is greater than 30 years from now use 19, otherwise use 20
		var checkYear = mToday.getFullYear() + 30;
		var mCheckYear = '20' + mYear;
		if (mCheckYear >= checkYear)
		mYear = '19' + mYear;
		else
		mYear = '20' + mYear;
		}
		var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
		if (!dateValid(vDateValueCheck)) {
		alert("Invalid Date\nPlease Re-Enter");
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
		}
		return true;
		}
		else {
		// Reformat the date for validation and set date type to a 1
		if (vDateValue.length >= 8  && dateCheck) {
		if (vDateType == 1) // mmddyyyy
		{
		var mDay = vDateName.value.substr(2,2);
		var mMonth = vDateName.value.substr(0,2);
		var mYear = vDateName.value.substr(4,4)
		vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
		}
		if (vDateType == 2) // yyyymmdd
		{
		var mYear = vDateName.value.substr(0,4)
		var mMonth = vDateName.value.substr(4,2);
		var mDay = vDateName.value.substr(6,2);
		vDateName.value = mYear+strSeperator+mMonth+strSeperator+mDay;
		}
		if (vDateType == 3) // ddmmyyyy
		{
		var mMonth = vDateName.value.substr(2,2);
		var mDay = vDateName.value.substr(0,2);
		var mYear = vDateName.value.substr(4,4)
		vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
		}
		//Create a temporary variable for storing the DateType and change
		//the DateType to a 1 for validation.
		var vDateTypeTemp = vDateType;
		vDateType = 1;
		var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
		if (!dateValid(vDateValueCheck)) {
		alert("Invalid Date\nPlease Re-Enter");
		vDateType = vDateTypeTemp;
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
		}
		vDateType = vDateTypeTemp;
		return true;
		}
		else {
		if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
		alert("Invalid Date\nPlease Re-Enter");
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
		         }
		      }
		   }
		}
		else {
		// Non isNav Check
		if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
		alert("Invalid Date\nPlease Re-Enter");
		vDateName.value = "";
		vDateName.focus();
		return true;
		}
		// Reformat date to format that can be validated. mm/dd/yyyy
		if (vDateValue.length >= 8 && dateCheck) {
		// Additional date formats can be entered here and parsed out to
		// a valid date format that the validation routine will recognize.
		if (vDateType == 1) // mm/dd/yyyy
		{
		var mMonth = vDateName.value.substr(0,2);
		var mDay = vDateName.value.substr(3,2);
		var mYear = vDateName.value.substr(6,4)
		}
		if (vDateType == 2) // yyyy/mm/dd
		{
		var mYear = vDateName.value.substr(0,4)
		var mMonth = vDateName.value.substr(5,2);
		var mDay = vDateName.value.substr(8,2);
		}
		if (vDateType == 3) // dd/mm/yyyy
		{
		var mDay = vDateName.value.substr(0,2);
		var mMonth = vDateName.value.substr(3,2);
		var mYear = vDateName.value.substr(6,4)
		}
		if (vYearLength == 4) {
		if (mYear.length < 4) {
		alert("Invalid Date\nPlease Re-Enter");
		vDateName.value = "";
		vDateName.focus();
		return true;
		   }
		}
		// Create temp. variable for storing the current vDateType
		var vDateTypeTemp = vDateType;
		// Change vDateType to a 1 for standard date format for validation
		// Type will be changed back when validation is completed.
		vDateType = 1;
		// Store reformatted date to new variable for validation.
		var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
		if (mYear.length == 2 && vYearType == 4 && dateCheck) {
		//Turn a two digit year into a 4 digit year
		var mToday = new Date();
		//If the year is greater than 30 years from now use 19, otherwise use 20
		var checkYear = mToday.getFullYear() + 30;
		var mCheckYear = '20' + mYear;
		if (mCheckYear >= checkYear)
		mYear = '19' + mYear;
		else
		mYear = '20' + mYear;
		vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
		// Store the new value back to the field.  This function will
		// not work with date type of 2 since the year is entered first.
		if (vDateTypeTemp == 1) // mm/dd/yyyy
		vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
		if (vDateTypeTemp == 3) // dd/mm/yyyy
		vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
		}
		if (!dateValid(vDateValueCheck)) {
		alert("Invalid Date\nPlease Re-Enter");
		vDateType = vDateTypeTemp;
		vDateName.value = "";
		vDateName.focus();
		return true;
		}
		vDateType = vDateTypeTemp;
		return true;
		}
		else {
		if (vDateType == 1) {
		if (vDateValue.length == 2) {
		vDateName.value = vDateValue+strSeperator;
		}
		if (vDateValue.length == 5) {
		vDateName.value = vDateValue+strSeperator;
		   }
		}
		if (vDateType == 2) {
		if (vDateValue.length == 4) {
		vDateName.value = vDateValue+strSeperator;
		}
		if (vDateValue.length == 7) {
		vDateName.value = vDateValue+strSeperator;
		   }
		}
		if (vDateType == 3) {
		if (vDateValue.length == 2) {
		vDateName.value = vDateValue+strSeperator;
		}
		if (vDateValue.length == 5) {
		vDateName.value = vDateValue+strSeperator;
		   }
		}
		return true;
		   }
		}
		if (vDateValue.length == 10&& dateCheck) {
		if (!dateValid(vDateName)) {
		// Un-comment the next line of code for debugging the dateValid() function error messages
		//alert(err);
		alert("Invalid Date\nPlease Re-Enter");
		vDateName.focus();
		vDateName.select();
		   }
		}
		return false;
		}
		else {
		// If the value is not in the string return the string minus the last
		// key entered.
		if (isNav4) {
		vDateName.value = "";
		vDateName.focus();
		vDateName.select();
		return false;
		}
		else
		{
		vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
		return false;
		         }
		      }
		   }
		}
		function dateValid(objName) {
		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";
		//strDate = datefield.value;
		strDate = objName;
		if (strDate.length < 1) {
		return true;
		}
		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);
		   }
		}
		//Adjustment for short years entered
		if (strYear.length == 2) {
		strYear = '20' + strYear;
		}
		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;
		      }
		   }
		}
		return true;
		}
		function LeapYear(intYear) {
		if (intYear % 100 == 0) {
		if (intYear % 400 == 0) { return true; }
		}
		else {
		if ((intYear % 4) == 0) { return true; }
		}
		return false;
		}