function clickIE()
      {
      if (document.all)
        return false;
      }

    function clickNS(e)
      {
      if (document.layers||(document.getElementById&&!document.all))
        if (e.which==2||e.which==3)
          return false;
      }

    if (document.layers)
      {
      document.captureEvents(Event.MOUSEDOWN);
      document.onmousedown=clickNS;
      }
      else
      {
      document.onmouseup=clickNS;
      document.oncontextmenu=clickIE;
      }
    document.oncontextmenu=new Function('return false');

    document.onselectstart=new Function('return false');
    function ds(e){return false;}
    function ra(){return true;}document.onmousedown=ds;document.onclick=ra;