function menu($acao,$link,$id){
	if($acao == "show"){
		// mantem a aparencia no link
		$link.className = "over";
		//exibe o submenu
		document.getElementById("submenu"+$id).style.display = "block";
	} else {
		$link.className = "";
		//exibe o submenu
		document.getElementById("submenu"+$id).style.display = "none";
	}
}