function toevoegen(waarde)
{
	document.formulier.bericht.value = document.formulier.bericht.value + waarde;
}

function beheer(bericht, url)
{
	if(confirm(bericht)) location.href = url;
}

function wachten()
{
	document.forms.formulier.knop.disabled = "true";
}
function aftellen(secs, spanid, dispmin) {
	spantje = document.getElementById(spanid);
	
	if(dispmin) {
		mins = parseInt(secs / 60);
		secs = (secs % 60);
	}else{
		mins = 0;
	}

	teldoor(mins, secs, spantje, dispmin);
}

function teldoor(mins, secs, span, dispmin) {
	stop = 0;
	secs--;
	
	if(!dispmin){
		if(secs==0){
			stop = 1;
		}
	}
	else {
		if(secs==0 && mins==0) {
			refresh();
		}
	}
	
	if(dispmin) {
		if(secs < 0) {
			mins--;
			secs = 59;
		}
	}
	
	if(dispmin) { 
		span.innerHTML = mins + (mins!=1?' minuten en ':' minuut en ') + secs + (secs!=1?' seconden':' seconde');
	}
	else {
		span.innerHTML = secs + ' seconden';
	}

	if(!stop)	setTimeout(function(){teldoor(mins, secs, span, dispmin)}, 1000);
}

function refresh() {
	window.location.reload(true);
}