function popup(pag,largura,altura,barra) {
	var Wnd = window.open(pag,"Janela","toolbar=no,location=no,directories=no,scrollbars="+barra+",resizable=no,copyhistory=no,width="+largura+ ",height="+altura+ ",status=no,left=0, top=1");
	Wnd.focus();
}