var timer = null;

function showSubmenu(strSubmenu){
	var objElements = document.getElementsByTagName("div");
	
	for(i=0;i<objElements.length;i++){
		//alert(objElements[i].id);
		if(objElements[i].id != ""){
			if(objElements[i].className == "lyr_submenu"){
				if(objElements[i].id == (strSubmenu)){
					document.getElementById(strSubmenu).style.visibility="visible";
				}
				else{
					objElement = document.getElementById(objElements[i].id);
					objElement.style.visibility="hidden";
				}
			}
		}
	}
	/*na 15 seconden verdwijnt het submenu
	timer = setTimeout("hideSubmenu('"+strSubmenu+"')",15000);
	//return false;*/
	
}

function hideSubmenu(strSubmenu){
	var objElement;
	//alert(strSubmenu);
	objElement = document.getElementById(strSubmenu);
	objElement.style.visibility="hidden";	
	clearTimeout(timer);
}