/* navegação do menu */
var timeout	= 500;
var closetimer	= 0;
var menuitem	= 0;

function abrir(id){	
	cancelclosetime();
	if(menuitem) 
	menuitem.style.visibility = 'hidden';
	menuitem = document.getElementById(id);
	menuitem.style.visibility = 'visible';
	
}
function fechar(){
	if(menuitem) 
	menuitem.style.visibility = 'hidden';
	
}
function closetime(){
	closetimer = window.setTimeout(fechar, timeout);
}
function cancelclosetime(){
	if(closetimer){
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

function ver(objecto){	
var x = document.getElementById(objecto);
	x.style.visibility = 'visible';	
}
function fechar(objecto){
var x = document.getElementById(objecto);
	x.style.visibility = 'hidden';
	
}