function regex_mail(mail) {		
	var regex = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
				
	return regex.test(mail);			
}

function verzend() {
	var form = document.forms["bestelformulier"];
	var name = form.name.value;
	var email = form.email.value;
	var address = form.address.value;
	var towncity = form.towncity.value;
	var postcode = form.postcode.value;
	
	var broodje = form.broodje.value;
	
	var returnVal = true;
	var message = "";
	
	if(name == "") {
		returnVal = false;
		message += "Naam invullen aub\n";
	}
	
	if((email == "") || (regex_mail(email) == false)) {
		returnVal = false;
		message += "Correct email adres invullen aub\n";
		form.email.focus();
	}
	
	if(address == "") {
		returnVal = false;
		message += "Adres invullen aub\n"
	}
	
	if(postcode == "") {
		returnVal = false;
		message += "Postcode invullen aub\n"
	}

	if(broodje == "") {
		returnVal = false;
		message += "Geef het broodje op dat je wilt bestellen\n";
	}

	if(returnVal == false) {
		alert(message);
		
		form.name.value = name;
		form.email.value = email;
		form.address.value = address;
		form.towncity.value = towncity;
		form.postcode.value = postcode;
		form.broodje.value = broodje;
		
	} else {
		form.submit();
		window.location = "index.html";
	}
}