function verzendForm() {
	var form = document.forms['verzendform'];
	var emailFilter=/^.+@.+\..{2,3}$/;
	
	if (form.naam.value == "") {
		alert( "Naam is verplicht." );
		return false;  
	}
	else if (form.woonplaats.value == "") {
		alert( "Woonplaats is verplicht." );
		return false;  
	}
	else if (form.telefoon.value == "") {
		alert( "Telefoon is verplicht." );
		return false;  
	}
	else if (!(emailFilter.test(form.email.value))) { 
	    alert( "Email is niet correct." );
		return false;
	} else {
		form.submit();
	}
}