/* this code needed to get the references right*/
	/** browser sniffer */
	/*var isIE4 = (document.all && !document.getElementById) ? true : false;
	var isIE5 = (document.all && document.getElementById) ? true : false;*/
	
	var isNS = (document.layers) ? true : false;
	var isIE = (document.all) ? true : false;
	var isNS6 = (!document.all && document.getElementById) ? true : false;


	
	/* 
		checkRequiredFields('main',form, names, require, validation, messages)
		Usage:
			<form action="Action.cfm"
		 	onsubmit="return checkRequiredFields('main','venueform',['RequiredField1Name','RequiredField2Name','RequiredField3Name'],
			[0,0,1],['Message1','Message2','Message3'])"
			>
		0 means validate (only useful for date, int, float), 1 means validate and require
	*/
	function checkRequiredFields(divName,formName, names, require, validation, messages){
		//alert("in check");
		if(isNS && !isNS6){
			if(divName != ''){
				formRef =  document.layers[divName].document.forms[formName];
			}else{
				formRef =  document.forms[formName];
			}
		}else{		
			formRef = this.document.forms[formName];
		}
		
		var flag = true;
		var errorTxt = "";
		for (i=0; i< names.length; i++){
			//alert("in loop");
			/* A select list*/
			if(validation[i]== "select"){
				var listRef = formRef.elements[names[i]];
				var selvalue = listRef[listRef.selectedIndex].value;
				if(parseInt(selvalue) == 0 && require[i] == 1){
					errorTxt = errorTxt + messages[i] + "\n";
					flag = false;
				}else{
					continue;
				}
			/* A multiple select list*/
			 }else if(validation[i]== "mselect"){
				//alert("checking mselect");
				var listRef = formRef.elements[names[i]];
				if(listRef.selectedIndex<0  && require[i] == 1){
					errorTxt = errorTxt + messages[i] + "\n";
					flag = false;
					//alert(flag);
				}else if (require[i] == 1){
					index = listRef.selectedIndex;
					//alert(index);
					if(listRef[index].value == 0){
						errorTxt = errorTxt + messages[i] + "\n";
						flag = false;
						//alert(flag);
					}else{
						continue;
					}
				}else{
					continue;
				}
				
			/* A list of checkboxes, at least one of them has to be checked*/
			 }else if(validation[i]== "cblist"){
				//alert("checking cblist");
				var cblistRef = formRef.elements[names[i]];
				//alert(cblistRef.length);
				if (require[i] == 1){
					checkedcb = 0;
					for (cbindex=0; cbindex< cblistRef.length; cbindex++){
						if(cblistRef[cbindex].checked){
							checkedcb = 1;
							break;
						}					
					}					
					if(checkedcb == 0){
						errorTxt = errorTxt + messages[i] + "\n";
						flag = false;
						//alert(flag);
					}else{
						continue;
					}
				}else{
					continue;
				}
			/* A date field */
			}else if(validation[i] == "date"){
				var checkdatereturn =  checkdate(divName,formName,names[i]);
				if(require[i] == 0){ //fied needs to be validated, but it is not required
					if (formRef.elements[names[i]].value != '' &&  !checkdatereturn) {
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}else{
					if (formRef.elements[names[i]].value == '' || !checkdatereturn) {
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}
			/*  integer field */
			}else if(validation[i] == "int"){
				if(require[i] == 0){ //fied needs to be validated, but it is not required
					if (formRef.elements[names[i]].value != '' &&  (isNaN(parseInt(formRef.elements[names[i]].value)) ||  (parseInt(formRef.elements[names[i]].value)) < 0)) {
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}else{
					if (formRef.elements[names[i]].value == '' || (isNaN(parseInt(formRef.elements[names[i]].value)) ||  (parseInt(formRef.elements[names[i]].value)) < 0)) {
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}
			/*  float field */
			}else if(validation[i]== "float"){
				if(require[i] == 0){ //fied needs to be validated, but it is not required
					if (formRef.elements[names[i]].value != '' &&  (isNaN(parseFloat(formRef.elements[names[i]].value)) ||  (parseFloat(formRef.elements[names[i]].value)) < 0)) {
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}else{
					if (formRef.elements[names[i]].value == '' || (isNaN(parseFloat(formRef.elements[names[i]].value)) ||  (parseInt(formRef.elements[names[i]].value)) < 0)) {
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}
			/*email */ 
			}else if(validation[i]== "email"){
				var str = formRef.elements[names[i]].value;
				//var filter = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/ ;
				if(require[i] == 0){ //fied needs to be validated, but it is not required
					if (str != '' && !(emailCheck(str)) ){
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}else{
					if ((str == '') || !(emailCheck(str)) ){
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}
			/*postcode */ 
			}else if(validation[i]== "postcode"){
				var str = formRef.elements[names[i]].value;
				if(require[i] == 0){ //fied needs to be validated, but it is not required
					if (str != '' && !(postit(str)) ){
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}else{
					if ((str == '') || !(postit(str)) ){
						flag = false;
						errorTxt = errorTxt + messages[i] + "\n";
					}else{
						continue;
					}
				}
			}else{
				stringvalue = trim(formRef.elements[names[i]].value); //to trim it first
				//alert("checking" +formRef.elements[names[i]]);
				if(stringvalue == ''  && require[i] == 1){
					flag = false;
					errorTxt = errorTxt + messages[i] + "\n";
				}else{
					continue;
				}
			}
		}
		
		if(!flag){
			alert(errorTxt);
		};
		
		return flag;
	}
				
	/* TWO STEPS TO INSTALL VALIDATION (DATE):
	Original:  Mike Welagen (welagenm@hotmail.com)
	This script and many more are available free online at
	The JavaScript Source!! http://javascript.internet.com
*/
	
	function checkdate(divName,formName,objName) {
	
		if(isNS && !isNS6){
			if(divName != ''){
				formRef =  document.layers[divName].document.forms[formName];
			}else{
				formRef =  document.forms[formName];
			}
		}else{		
			formRef = this.document.forms[formName];
		}
		//var datefield = formRef.elements[objName];
		//var datefield = objName;
		if (chkdate(divName,formName,objName) == false) {
			//datefield.select();
			//alert("That date is invalid.  Please try again.");
			//datefield.focus();
			return false;
		} else {
			return true;
		}
	}
	
	
	function chkdate(divName,formName,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;
		if(isNS && !isNS6){
			if(divName != ''){
				var datefield = document.layers[divName].document.forms[formName].elements[objName];
			}else{
				var datefield = document.forms[formName].elements[objName];
			}
		}else{		
			var datefield = this.document.forms[formName].elements[objName];
		}
		//var strSeparatorArray = new Array("-"," ","/",".");
		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;
		}
		
		/* checks that the original string contains to tokens and fils strDay, strMonth and strYear */
		/* boofound = true if everything went ok */
		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];
					if(strYear.length != 4){
						err = 1;
						return false;
					}
				}
				booFound = true;
	 		}
		}
		
		if (booFound == false) {
			/*if (strDate.length>5) {
				strDay = strDate.substr(0, 2);
				strMonth = strDate.substr(2, 2);
				strYear = strDate.substr(4);
			}*/
			err = 1;
			return false;
		}
		
		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;
		 	}
			*/
			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) */
	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) */
	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.");
		}
	}

	/* 1.1.4: Fixed a bug where upper ASCII characters (i.e. accented letters
	international characters) were allowed.
	
	1.1.3: Added the restriction to only accept addresses ending in two
	letters (interpreted to be a country code) or one of the known
	TLDs (com, net, org, edu, int, mil, gov, arpa), including the
	new ones (biz, aero, name, coop, info, pro, museum).  One can
	easily update the list (if ICANN adds even more TLDs in the
	future) by updating the knownDomsPat variable near the
	top of the function.  Also, I added a variable at the top
	of the function that determines whether or not TLDs should be
	checked at all.  This is good if you are using this function
	internally (i.e. intranet site) where hostnames don't have to 
	conform to W3C standards and thus internal organization e-mail
	addresses don't have to either.
	Changed some of the logic so that the function will work properly
	with Netscape 6.
	
	1.1.2: Fixed a bug where trailing . in e-mail address was passing
	(the bug is actually in the weak regexp engine of the browser; I
	simplified the regexps to make it work).
	
	1.1.1: Removed restriction that countries must be preceded by a domain,
	so abc@host.uk is now legal.  However, there's still the 
	restriction that an address must end in a two or three letter
	word.
	
	1.1: Rewrote most of the function to conform more closely to RFC 822.
	
	1.0: Original  */
	// -->
	
	// Begin
	function emailCheck (emailStr) {
	
	/* The following variable tells the rest of the function whether or not
	to verify that the address ends in a two-letter country or well-known
	TLD.  1 means check it, 0 means don't. */
	
	var checkTLD=1;
	
	/* The following is the list of known TLDs that an e-mail address must end with. */
	
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	
	/* The following pattern is used to check if the entered e-mail address
	fits the user@domain format.  It also is used to separate the username
	from the domain. */
	
	var emailPat=/^(.+)@(.+)$/;
	
	/* The following string represents the pattern for matching all special
	characters.  We don't want to allow special characters in the address. 
	These characters include ( ) < > @ , ; : \ " . [ ] */
	
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	
	/* The following string represents the range of characters allowed in a 
	username or domainname.  It really states which chars aren't allowed.*/
	
	var validChars="\[^\\s" + specialChars + "\]";
	
	/* The following pattern applies if the "user" is a quoted string (in
	which case, there are no rules about which characters are allowed
	and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
	is a legal e-mail address. */
	
	var quotedUser="(\"[^\"]*\")";
	
	/* The following pattern applies for domains that are IP addresses,
	rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
	e-mail address. NOTE: The square brackets are required. */
	
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	
	/* The following string represents an atom (basically a series of non-special characters.) */
	
	var atom=validChars + '+';
	
	/* The following string represents one word in the typical username.
	For example, in john.doe@somewhere.com, john and doe are words.
	Basically, a word is either an atom or quoted string. */
	
	var word="(" + atom + "|" + quotedUser + ")";
	
	// The following pattern describes the structure of the user
	
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	
	/* The following pattern describes the structure of a normal symbolic
	domain, as opposed to ipDomainPat, shown above. */
	
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	
	/* Finally, let's start trying to figure out if the supplied address is valid. */
	
	/* Begin with the coarse pattern to simply break up user@domain into
	different pieces that are easy to analyze. */
	
	var matchArray=emailStr.match(emailPat);
	
	if (matchArray==null) {
	
	/* Too many/few @'s or something; basically, this address doesn't
	even fit the general mould of a valid e-mail address. */
	
	//alert("Email address seems incorrect (check @ and .'s)");
	return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	
	// Start by checking that only basic ASCII characters are in the strings (0-127).
	
	for (i=0; i<user.length; i++) {
	if (user.charCodeAt(i)>127) {
	//alert("Ths username contains invalid characters.");
	return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
	if (domain.charCodeAt(i)>127) {
	//alert("Ths domain name contains invalid characters.");
	return false;
	   }
	}
	
	// See if "user" is valid 
	
	if (user.match(userPat)==null) {
	
	// user is not valid
	
	//alert("The username doesn't seem to be valid.");
	return false;
	}
	
	/* if the e-mail address is at an IP address (as opposed to a symbolic
	host name) make sure the IP address is valid. */
	
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
	
	// this is an IP address
	
	for (var i=1;i<=4;i++) {
	if (IPArray[i]>255) {
	//alert("Destination IP address is invalid!");
	return false;
	   }
	}
	return true;
	}
	
	// Domain is symbolic name.  Check if it's valid.
	 
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
	if (domArr[i].search(atomPat)==-1) {
	//alert("The domain name does not seem to be valid.");
	return false;
	   }
	}
	
	/* domain name seems valid, but now make sure that it ends in a
	known top-level domain (like com, edu, gov) or a two-letter word,
	representing country (uk, nl), and that there's a hostname preceding 
	the domain or country. */
	
	if (checkTLD && domArr[domArr.length-1].length!=2 && 
	domArr[domArr.length-1].search(knownDomsPat)==-1) {
	//alert("The address must end in a well-known domain or two letter " + "country.");
	return false;
	}
	
	// Make sure there's a host name preceding the domain.
	
	if (len<2) {
	//alert("This address is missing a hostname!");
	return false;
	}
	
	// If we've gotten this far, everything's valid!
	return true;
	}

	//  End -->


	function trim(strText) { 
	    // this will get rid of leading spaces 
	    while (strText.substring(0,1) == ' ') 
	        strText = strText.substring(1, strText.length);
	
	    // this will get rid of trailing spaces 
	    while (strText.substring(strText.length-1,strText.length) == ' ')
	        strText = strText.substring(0, strText.length-1);
	
	   return strText;
	} 

	
/*

UK Postcode Format Validation 

Postcodes must conform to the following rules:- 

The total length must be 6,7, or 8 characters, a gap (space character) must be included 
The inward code, the part to the right of the gap, must always be 3 characters 
The first character of the inward code must be numeric 
The second and third characters of the inward code must be alpha 
The outward code, the part to the left of the gap, can be 2,3, or 4 characters 
The first character of the outward code must be alpha 
	
*/
	
function postit(test){ //check postcode format is valid
	size = test.length
	test = test.toUpperCase(); //Change to uppercase
	while (test.slice(0,1) == " ") //Strip leading spaces
	{
		test = test.substr(1,size-1);size = test.length
	}
	while(test.slice(size-1,size)== " ") //Strip trailing spaces
	{
		test = test.substr(0,size-1);size = test.length
	}
	if (size < 6 || size > 8)
	{ //Code length rule
		return false;
	}
	if (!(isNaN(test.charAt(0))))
	{ //leftmost character must be alpha character rule
		return false;
	}
	if (isNaN(test.charAt(size-3)))
	{ 
		//first character of inward code must be numeric rule
		return false;
	}
	if (!(isNaN(test.charAt(size-2))))
	{ //second character of inward code must be alpha rule
		return false;
	}
	if (!(isNaN(test.charAt(size-1))))
	{ //third character of inward code must be alpha rule
		return false;
	}
	if (!(test.charAt(size-4) == " "))
	{//space in position length-3 rule
		return false;
	}
	count1 = test.indexOf(" ");count2 = test.lastIndexOf(" ");
	if (count1 != count2)
	{//only one space rule
		return false;
	}
	return true;
	}
//  End -->