var zichtbaar = '1';
var vertraginga;
var vertragingb;
function showSubnav(tmpa){
	tmp2a = tmpa;
	clearTimeout(vertraginga);
	vertraginga = setTimeout('ChangeNow(tmp2a,\'1\')',50);
}
function hideSubnav(tmpb){
	zichtbaar = '0';
	tmpb2 = tmpb;
	clearTimeout(vertraginga);
	clearTimeout(vertragingb);
	vertragingb = setTimeout('ChangeNow(tmpb2,\'0\')',500);
}
function ChangeNow(welke,zien){
	if(document.getElementById){
		if(zien == '0' && zichtbaar != '1'){
			var varData = document.getElementById("menu").getElementsByTagName("div");
			for (var i = 0; i < varData.length; i++) {
				varData[i].style.visibility = 'hidden';
				varData[i].style.display = 'none';
			}
		}else{
			var varData = document.getElementById("menu").getElementsByTagName("div");
			for (var i = 0; i < varData.length; i++) {
				varData[i].style.visibility = 'hidden';
				varData[i].style.display = 'none';
			}
			document.getElementById('subnav'+welke).style.visibility = 'visible';
			document.getElementById('subnav'+welke).style.display = 'block';
			zichtbaar = '1';
			clearTimeout(vertragingb);
		}
	}
}