// JavaScript Document
var timer;
function showLayer(welke) {
	if(timer) {
		clearTimeout(timer);
	}
	if(document.getElementById(welke)) {
		document.getElementById(welke).style.visibility = "visible";
	}
	timer=setTimeout("showLayer('"+welke+"')", 500);
}
function hideLayer(welke) {
	//if(document.getElementById(welke)) {
	if(timer) {
		clearTimeout(timer);
	}
	timer=setTimeout("hideLayer2('"+welke+"')", 500)
	//}
}

function hideLayer2(welke) {
	if(timer) {
		clearTimeout(timer);
	}
	if(document.getElementById(welke)) {
		document.getElementById(welke).style.visibility = "hidden";
	}
}