var aantal;
var zichtbaar = '1';
var vertraginga;
var vertragingb;
function showSubnav(tmpa,aantal){
	tmp2a = tmpa;
	aantal2 = aantal;
	clearTimeout(vertraginga);
	vertraginga = setTimeout('ChangeNow(tmp2a,aantal2,\'1\')',100);
}
function hideSubnav(tmpb,aantal){
	zichtbaar = '0';
	tmpb2 = tmpb;
	aantal2 = aantal;
	clearTimeout(vertraginga);
	clearTimeout(vertragingb);
	vertragingb = setTimeout('ChangeNow(tmpb2,aantal2,\'0\')',500);
}
function ChangeNow(welke,aantal,zien){
	if(document.getElementById){
		if(zien == '0' && zichtbaar != '1'){
			for(var i=1;i<=aantal;i++){
				document.getElementById('subnav'+i).style.visibility = 'hidden';
				document.getElementById('subnav'+i).style.display = 'none';
			}
		}else{
			for(var i=1;i<=aantal;i++){
				document.getElementById('subnav'+i).style.visibility = 'hidden';
				document.getElementById('subnav'+i).style.display = 'none';
			}
			document.getElementById('subnav'+welke).style.visibility = 'visible';
			document.getElementById('subnav'+welke).style.display = 'block';
			zichtbaar = '1';
			clearTimeout(vertragingb);
		}
	}
}