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;
	}
}

// For form validtion
function chkdate(objName) {
	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 echeck(str) {
	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	if (str.indexOf(at)==-1){
		alert("Invalid E-mail ID");
		return false;
	}
	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		alert("Invalid E-mail ID");
		return false;
	}
	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		alert("Invalid E-mail ID");
		return false;
	}
	if (str.indexOf(at,(lat+1))!=-1){
		alert("Invalid E-mail ID");
		return false;
	}
	if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		alert("Invalid E-mail ID");
		return false;
	}
	if (str.indexOf(dot,(lat+2))==-1){
		alert("Invalid E-mail ID");
		return false;
	}
	if (str.indexOf(" ")!=-1){
		alert("Invalid E-mail ID");
		return false;
	}
	return true;
}


function ValidateEmail(){
	var emailID=document.book.Email_Address;
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email ID");
		emailID.focus();
		return false;
	}
	if (echeck(emailID.value)==false){
		emailID.value="";
		emailID.focus();
		return false;
	}
	return true;
}


function concatenateFields() {
	document.book.realname.value = document.book.Forename.value + " " + document.book.Surname.value;
}


function doSubmit(){
	if(document.book.Forename.value==""){
		alert("Please enter a forename.");
		return false;
	}
	if(document.book.Surname.value==""){
		alert("Please enter a surname.");
		return false;
	}
	if(document.book.Arrival_Date.value == ""){
		alert("Please enter an arrival date.");
		return false;
	}
	concatenateFields();
	intplaces=parseInt(document.book.Number_Of_Beds.value, 10);
	if(isNaN(intplaces)){
		alert("Number of beds must be a digit.");
		return false;
	}
	intplaces=parseInt(document.book.Number_Of_Nights.value, 10);
	if(isNaN(intplaces)){
		alert("Number of nights must be a digit.");
		return false;
	}

	return ValidateEmail();
}