function abre(area){
	if(area == '1'){
		document.getElementById("tit1").className = "hide";
		document.getElementById("tit2").className = "show";
		document.getElementById("listavisitas").className = "show";
		document.getElementById("menuprincipal").className = "semlinha";
	}else{
		document.getElementById("tit1").className = "show";
		document.getElementById("tit2").className = "hide";
		document.getElementById("listavisitas").className = "hide";
		document.getElementById("menuprincipal").className = "";
	}
	
}