function popup(pag) {
	var left = window.width / 2;
	var top = window.heigth / 2;
	var Wnd = window.open(pag,"Janela","toolbar=no,location=no,directories=no,scrollbars=yes,resizable=no,copyhistory=no,width=800 ,height=500 ,status=yes,left=0, top=1");
	Wnd.focus();
}