function bereken() {
		var inbreng = new String(document.forms.hypotheekformulier.inbreng.value);
		var kosten = new String(document.forms.hypotheekformulier.kosten.value);
		var rente = new String(document.forms.hypotheekformulier.procent.options[document.forms.hypotheekformulier.procent.selectedIndex].value);
		var schuld = kosten-inbreng;
		var jaar = (schuld/100)*rente ;
		var maand = jaar/12
		document.forms.hypotheekformulier.result.value = (Math.round(maand*100))/100;
		}
		
function init(f) {

	if(f.lastName!=undefined) f.lastName.setAttribute('required','Uw naam is verplicht.');
	if(f.email!=undefined) {
		f.email.setAttribute('required','E-mail is verplicht.');
		f.email.setAttribute('validate','email');
		f.email.setAttribute('message','vul een geldig e-mail adres in');
		}
	if(f.email_receiver!=undefined) {
		f.email_receiver.setAttribute('required','E-mail ontvanger is verplicht.');
		f.email_receiver.setAttribute('validate','email');
		f.email_receiver.setAttribute('message','vul een geldig e-mail adres in');
		}
		
	}
	
var objectmapLoaded;
function loadObjectmap() {
     if (!objectmapLoaded) {
       	objectmapLoaded = true;
			document.getElementById("objectmapIFrame").src = document.getElementById("objectmapIFrame").src;
	}
	return true;
 }