function abre_janela(theURL, altura, largura) {
		propriedades = "\"menubar=no,toolbar=no,scrollbars=yes,resizable=yes,status=no,location=no,directories=no,copyhistory," + "height=" + altura + ",width=" + largura +"\"";
		var contactWindow=window.open
		(theURL, "NewWalkMode", propriedades);
		contactWindow.focus();
	}

function abreJanela(pagina, nome, w, h, rolagem) {
var winl = (window.screen.availWidth/2)-(w/2);
var wint = (window.screen.availHeight/2)-(h/2)-12;
var winProps = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+rolagem+',resizable=no';
win = window.open(pagina, nome, winProps)
win.window.focus();
}