function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
function janela(url, width, height)
{
var windowname = "imagem";
var windowparam = "width="+width+",height="+height+",resizable=0,location=0,status=0,directories=0,status=0,scrolls=1";
window.open('imagens/'+url,windowname,windowparam);
}