function abreMenu(local){
	var bloco = document.getElementById(local);
	if (bloco.style.display != 'block'){
		if (arguments.lenth == 2) document.getElementById(local+'Seta').setAttribute('src','/img/setaAcima.gif');
		document.getElementById(local).style.display = 'block';
	}else{
                if (arguments.lenth == 2) document.getElementById(local+'Seta').setAttribute('src','/img/setaAbaixo.gif');
		document.getElementById(local).style.display = 'none';
	}
}