var win = null;

  function SauberMachen()
  {	
        if(win != null)
            if(win.closed != true)
                win.close();
  }
            
  function DetailFenster(URL)
  {
    var optionen = "width=500,height=190,scrollbars=yes,resizable=yes";

    if(win == null)
    {
        win = window.open(URL, "", optionen);
    }
    else
    {
        if(win.closed == true)
        {
            win = window.open(URL, "", optionen);
        }
        else
        {
            win.location.href = URL + "";
            win.focus();
        }
    }
  }