var RE_popUpWin=0;
function RE_popUpWindow(URLStr)
{
  if(RE_popUpWin)
  {
    if(!RE_popUpWin.closed) RE_popUpWin.close();
  }
  var width = 700;
  var height = 500;
  var top = (screen.availHeight - (height + 16)) / 2;
  var left = (screen.availWidth - width) / 2;   
  RE_popUpWin = open(URLStr, 'RE_popUpWin', 'toolbar=no,location=no,directories=no,status=no,menub ar=no,scrollbar=no,resizable=yes,copyhistory=no,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}