function createBookmarkLink() {
   title = "You Cool";
   url = "http://www.youcool.org/";

   if (navigator.userAgent.toLowerCase().indexOf('chrome') > -1)
   {
      //google chrome
      alert ('Press <Control> + D to bookmark in Chrome');
   }
   else if (window.sidebar)
   {
      // firefox
      alert ('Press <Control> + D to bookmark in Firefox');
   }
   else if(window.opera && window.print)  // opera
   {
      var elem = document.createElement('a');
      elem.setAttribute('href',url);
      elem.setAttribute('title',title);
      elem.setAttribute('rel','sidebar');
      elem.click();
   }
   else if(document.all) // ie
      window.external.AddFavorite(url, title);
}