function PopWin(url, name, width, height) {
  var win = window.open(url, name, "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width="+width+",height="+height+",left=0,top=0,dependent=yes");

  if(window.focus)
    win.focus();
}

function Tab() {
  if(dirty) {
    return confirm("Continue without saving your changes?");
  }
  else
    return true;
}