/* Recebe parametros e centraliza os Pop Ups na tela */
function PopUpCentralizado(nomepagina, titulopagina, w, h, scroll) {
  var winl = (screen.width - w) / 2;
  var wint = (screen.height - h) / 2;
  winprops = 'height=' + h + ', width = ' + w + ', top = ' + wint + ', left = ' + winl + ', scrollbars = ' + scroll + ', location=no, status=no';
  win = window.open(nomepagina, titulopagina, winprops);
  if (parseInt(navigator.appVersion)  >= 4) {
      win.window.focus();
  }
}