function addBookmark(url, title){
  if(window.sidebar){ // Firefox
    window.sidebar.addPanel(title, url,'');
    alert("Firefox has just added the bookmark that will open in the sidebar by default. If you want it to open in the main window instead, please go to Bookmarks, right-click the recently added bookmark, choose 'Properties' and uncheck the 'load this bookmark in the sidebar' option. Sorry, this is unavoidable with Firefox so far.");
  }
  else if(window.opera){ //Opera
    var a = document.createElement("A");
    a.rel = "sidebar";
    a.target = "_search";
    a.title = title;
    a.href = url;
    a.click();
  }
  else if(document.all){ //IE
    window.external.AddFavorite(url, title);
  }
}