function validateForm (form) {
	// v['Naam'] is de veldnaam die gevalideerd moet worden
	// als er een validatiefunctie is met de zelfde nam zal validatie plaats vinden
	var v = new Object();
	v ['Achternaam'] = "U moet uw achternaam invullen";
	v ['Adres'] = "U moet uw adres invullen";
	v ['Postcode'] = "U moet een geldige Nederlandse postcode invullen";
	v ['Plaats'] = "U moet uw woonplaats invullen";
	v ['Email'] = "U moet een geldig e-mailadres invullen";
	
	// welk formulier wil ik valideren
	var formname = form;
	

	if (!document.forms[formname]) {alert('implementatiefout');return}
	
	if (validate) {
		for (var el in v) {
			var formfieldObj = document.forms[formname][el];
			var errorflag = false;
			if (formfieldObj) {
				if (validate[el]) {
					var error = validate [el] (formfieldObj, v[el]);
					if (error) {
						error[1].focus();
						error[1].style.border = '1px red solid';
						alert(error[0]);
						errorflag = true;
						break;
					}
				}
			}
		}
		if (!errorflag)
			document.forms[formname].submit();
	}


}

var validate = new Object();

validate['Voornaam'] = function (arg, text) {return validate['_algemeen_'] (arg, text);}
validate['Achternaam'] = function (arg, text) {	return validate['_algemeen_'] (arg, text);}
validate['Adres'] = function (arg, text) {	return validate['_algemeen_'] (arg, text);}
validate['Plaats'] = function (arg, text) {	return validate['_algemeen_'] (arg, text);}

validate['Postcode'] = function (arg, text) {
	var myerror = false;
	if (!/^[0-9]{4}\s*[a-z]{2}\s*$/i.test(arg.value)) {
		myerror = new Array()
		myerror[0] = text;
		myerror[1] = arg;
	}
	return myerror;
}

validate['Email'] = function (arg, text) {
	var myerror = false;
	if (!checkEmail(arg)) {
		myerror = new Array()
		myerror[0] = text;
		myerror[1] = arg;
		}
	return myerror;
}

validate['_algemeen_'] = function (arg, text) {
	var myerror = false;
	if (arg.value=='') {
		myerror = new Array()
		myerror[0] = text;
		myerror[1] = arg;
	}
	return myerror;
}

function checkEmail(myField){
	// The JavaScript Source!! http://javascript.internet.com 
	// V1.1.3: Sandeep V. Tamhankar (stamhankar@hotmail.com) 
	// Original:  Sandeep V. Tamhankar (stamhankar@hotmail.com) 
	
	emailStr = myField.value
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
	var emailPat=/^(.+)@(.+)$/;
	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	var atom=validChars + '+';
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			return false;
		}
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			return false;
	   }
	}
	if (user.match(userPat)==null) {
		return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
	for (var i=1;i<=4;i++) {
		if (IPArray[i]>255) {
			return false;
	   }
	}
	return true;
	}
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			return false;
	   }
	}
	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {
		return false;
	}
	if (len<2) {
		return false;
	}
	return true;
}