function initValidation(){
				define('fldNaam','string','Naam',3,null);
				define('fldVoorletters','string','Voorletters',1,null);
				define('fldEmail','email','E-mail adres');
				define('fldAdres','string','Adres',3,null);
				define('fldPostcode','string','Postcode',6,null);
				define('fldPlaats','string','Woonplaats',2,null);	
			}

			function SubmitForm() {
				rel = document.forms['x'].fldRelatienummer.value;
				validate();
				if (returnVal) {
					if (rel.length > 1 && rel.length  < 6){
						alert('Vul een geldig relatienummer in1')	
					}										
					else if (1 == 1) {
						document.forms['x'].submit();
					}
					else{
						alert('U heeft geen artikelen geselecteerd! Voeg eerst artikelen toe aan uw mandje.')
					}
					
				}
			}
			
			function ResetForm() {
				document.forms['x'].reset();			
			}

			function Add2Order(id) {
				var st = eval("document.forms['x'].fldA"+id+".value");
				window.location.href = "default.asp?act=add&showall=1&publication=" + id + "&aantal=" + st;

			}
			
			function UpdateCart(row) {
				var st = eval("document.forms['x'].fldAC"+row+".value");
				window.location.href = "default.asp?act=update&showall=1&item=" + row + "&aantal=" + st;

			}			
			
			function CleanPostcode(str) {
				str = str.replace(/ /g, '' );
				return str;
			}
			
			function isDate(dateStr) {
			
			var datePat = /^(\d{1,2})(\/|-)(\d{1,2})(\/|-)(\d{4})$/;
			var matchArray = dateStr.match(datePat); // is the format ok?
			
			if (matchArray == null) {
			//alert("Please enter date as either mm/dd/yyyy or mm-dd-yyyy.");
			return false;
			}
			
			day = matchArray[1]; // p@rse date into variables
			month= matchArray[3];
			year = matchArray[5];
			
			if (month < 1 || month > 12) { // check month range
			//alert("Month must be between 1 and 12.");
			return false;
			}
			
			if (day < 1 || day > 31) {
			//alert("Day must be between 1 and 31.");
			return false;
			}
			
			if ((month==4 || month==6 || month==9 || month==11) && day==31) {
			//alert("Month "+month+" doesn`t have 31 days!")
			return false;
			}
			
			if (month == 2) { // check for february 29th
			var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
			if (day > 29 || (day==29 && !isleap)) {
			//alert("February " + year + " doesn`t have " + day + " days!");
			return false;
			}
			}
			return true; // date is valid
			}
				
				
			initValidation();