function popupWindow(url, name, top, left, width, height)
{
  var features="toolbar=0,location=0,directory=0,status=0,menubar=0,scrollbars=0,resizeable=0"
  features=width>0 ? features+",width="+width : features;
  features=height>0 ? features+",height="+height : features;
  features=left>=0 ? features+",left="+left : features;
  features=top>=0 ? features+",top="+top : features;

  open(url, name, features);
}