var maxAantal = 15;
var welke = 0;
function wissel(){
	welke = welke + 1;
	if(welke > maxAantal){
		welke = 0;
	}
	clearTimeout(myTimer);
	field=document.getElementById('logo'+welke);
	for (i=0;i<=maxAantal;i++){
		document.getElementById('logo'+i).style.visibility = 'hidden';
		document.getElementById('logo'+i).style.display = 'none';
	}
	field.style.display = 'block';
	field.style.visibility = 'visible';
	myTimer=setTimeout('wissel()',6000);
}