function getLayer(name) {
	return (document.all)?document.all[name]:document.getElementById(name);
} 

function fadeMenu(oId) {
	menu = getLayer(oId);
	menu.style.display='none';
}

function showSubMenu(oId) {  
    menu = getLayer('submenu_'+oId);
	
	clearTimeout(menu.fade);
	menu.style.display='block';
}

function hideSubMenu(oId) {
	menu = getLayer('submenu_'+oId);
	
	clearTimeout(menu.fade);
	menu.fade = setTimeout("fadeMenu('submenu_"+oId+"')", 50);
}