function errorMsg()
{
  alert("Netscape 6 or Mozilla is needed to install a sherlock plugin");
}

function addEngine(name,ext,cat,type)
{
  if ((typeof window.sidebar == "object") && (typeof
  window.sidebar.addSearchEngine == "function"))
  {
    //cat="Web";
    //cat=prompt('In what category should this engine be installed?','Web')
    window.sidebar.addSearchEngine(
      "http://hades.grainger.uiuc.edu/chris/plugins/"+name+".src",
      "http://hades.grainger.uiuc.edu/chris/plugins/"+name+"."+ext,
      name,
      cat );
  }
  else
  {
    errorMsg();
  }
}