var submitted=0;
function checkForm() {
	if (document.editForm.naam.value=="") {
		alert( "Vul uw naam in!");
		document.editForm.naam.focus();
	} else if (!isEmail(document.editForm.email.value)) {
		alert( "Vul uw e-mailadres in!");
		document.editForm.email.focus();
	} else if (document.editForm.telefoon.value=="") {
		alert( "Vul uw telefoonnummer in!");
		document.editForm.telefoon.focus();
	} else if (document.editForm.website.value=="") {
		alert( "Vul uw website in!");
		document.editForm.website.focus();
	} else if (!submitted) {
		submitted=1;
		document.editForm.savebutton.value = "Bezig...";
		document.editForm.submit();
	}
}

var submitted=0;
function checkNewsletterForm() {
	if (document.newsletterForm.name.value=="") {
		alert( "Vul uw naam in!");
		document.newsletterForm.name.focus();
	} else if (!isEmail(document.newsletterForm.email.value)) {
		alert( "Vul uw e-mailadres in!");
		document.newsletterForm.email.focus();
	} else if (!submitted) {
		submitted=1;
		document.newsletterForm.savebutton.value = "Bezig...";
		document.newsletterForm.submit();
	}
}

function isEmail(str) {
	return (str.match(new RegExp('^[\'_a-zA-Z0-9-]+(\.[\'_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*\.(([a-zA-Z]{2,3})|(aero|coop|info|museum|name))$')))?true:false;	
}