function bookmark() {
title =document.title; 
url = document.location.href;
if (window.sidebar) { //firefox bookmark functionality
window.sidebar.addPanel(title, url,"");
} else if( window.external ) { //ie favorite functionality
window.external.AddFavorite( url, title); 
}else if(window.opera){//opera virtual sidebar link
a = document.createElement("A");
a.rel = "sidebar";
a.target = "_search";
a.title = title;
a.href = url;
a.click();}
}