function addBookmark(title, url){
  
  if(window.sidebar){
    
    // firefox
    window.sidebar.addPanel(title, url, '');
    
  }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){
    
    // internet explorer
    window.external.AddFavorite(url, title);
    
  }

}