var timer = null;

function showMenu(obj) {
	if(timer) {
			clearTimeout(timer);
			timer = null;
	}

	var menu_layer = getMenu(obj);
	var menu_item = obj;
	if (menu_item == obj) {
			menu_layer.style.visibility="visible";
			menu_layer.style.display="block";
			menu_layer.style.left = "-219px";
			menu_layer.style.top = "45px"; 
	}
	
}

function getMenu(obj) {
	if(document.layers) {
		return document.layers[obj];
	} else if(document.all && !document.getElementById) {
	return document.all[obj];
	} else if(document.getElementById) {
	return document.getElementById(obj);
	} else {
	 return null;
	}
}

function hideMenu(obj) {

	var menu_layer = getMenu(obj);

	if(!menu_layer) {
		return;
	}

	if(document.layers) {
		menu_layer.visibility="hidden";
	} else {
		menu_layer.style.display="none";
		menu_layer.style.visibility="hidden";
	}

}

function timerMenu (obj) {
	if(document.layer) {
		return;
	}
	timer = setTimeout('hideMenu("' + obj +'")', 300);  
}