function RunningInCHM()
  {
    var wstr = document.location.href.substr(0,14);
    return (wstr == 'mk:@MSITStore:');
  }


  function RunningInHxS()
  {
    var wstr = document.location.href.substr(0,10);
    return (wstr == 'ms-help://');
  }


  function RunningInHost()
  {
    return RunningInCHM() || RunningInHxS();
  }