var newWin = null;
function popUp(strURL, strType, strHeight, strWidth) {
  if (newWin != null && !newWin.closed)
    newWin.close();
  var strOptions="";
  if (strType=="console")
    strOptions="resizable,height="+
      strHeight+",width="+strWidth;
  if (strType=="fixed")
    strOptions="status,height="+
      strHeight+",width="+strWidth;
  if (strType=="elastic")
    strOptions="toolbar,menubar,scrollbars,"+
      "resizable,location,height="+
      strHeight+",width="+strWidth;
  newWin = window.open(strURL, 'newWin', strOptions);
  newWin.focus();
}