function checkdate(objName) {
		var datefield = objName;
		//alert ('Here is the birthdate ' + form.vcBirthdate.value);
		if (chkdate(objName) == false) {
		datefield.select();
		if (window.uselang) {
			switch(window.uselang) {
				case 'es':
					alert("Esa fecha es inv\u00e1lida. Por favor intente de nuevo.");
					break;
				default:
					alert("That date is invalid.  Please try again.");
					break;
			}
		} else {
			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";
		strDate = datefield.value;
		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);
		   }
		}
		if (strYear.length == 2) {
		strYear = '20' + 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;
		}
		return true;
		}
		function LeapYear(intYear) {
		if (intYear % 100 == 0) {
		if (intYear % 400 == 0) { return true; }
		}
		else {
		if ((intYear % 4) == 0) { return true; }
		}
		return false;
		}
		//function doDateCheck(from, to) {
		//if (Date.parse(from.value) <= Date.parse(to.value)) {
		//alert("The dates are valid.");
		//}
		//else {
		//if (from.value == "" || to.value == "") 
		//alert("Both dates must be entered.");
		//else 
		//alert("To date must occur after the from date.");
		//   }
		//}