var mtid = false;


function showMenu(divid){

	if (document.all){
 		obj = document.all[divid]
		switch (divid) {
		case "mediamenu":
			document.all["programmamenu"].style.visibility="hidden"
			document.all["deelnemersmenu"].style.visibility="hidden"
		case "programmamenu":
			document.all["deelnemersmenu"].style.visibility="hidden"
			document.all["mediamenu"].style.visibility="hidden"
		case "deelnemersmenu":
			document.all["programmamenu"].style.visibility="hidden"
			document.all["mediamenu"].style.visibility="hidden"
		}	
	}
	else
	{
		obj = document.getElementById(divid);
		switch (divid){
		case "mediamenu":
			document.getElementById("programmamenu").style.visibility="hidden"
			document.getElementById("deelnemersmenu").style.visibility="hidden"
		case "programmamenu":
			document.getElementById("deelnemersmenu").style.visibility="hidden"
			document.getElementById("mediamenu").style.visibility="hidden"
		case "deelnemersmenu":
			document.getElementById("programmamenu").style.visibility="hidden"
			document.getElementById("mediamenu").style.visibility="hidden"
		}
		
	}

	if (mtid != false){ 
		clearTimeout(mtid)
	}
	
	obj.style.visibility = "visible"
	
}

function hideMenu(divid){
 	if (document.all){
 		obj = document.all[divid]
	}
	else
	{
		obj = document.getElementById(divid)
	}
	mtid = setTimeout('obj.style.visibility = "hidden"', 100);
}