function mostraEscondeSubMenu(id){
	if(id != "" && id != "0"){
		id = "menu_"+id;
		var estado = (document.getElementById(id).style.display == "none") ? "block" : "none";
		var tagLinks = document.getElementById("menu_produto_loja").getElementsByTagName("span");
		for ( var i = 0, span; span = tagLinks[i]; i++ ) {
			span.style.display = "none";
		}
		document.getElementById(id).style.display = estado;
	}
}