<script language=javascript type=text/javascript>

$(document).ready(function(){

  $(a.jQueryBookmark).click(function(e){

    e.preventDefault(); // this will prevent the anchor tag from going the user off to the link

    var bookmarkUrl = this.href;

    var bookmarkTitle = this.title;



    if (window.sidebar) { // For Mozilla Firefox Bookmark

        window.sidebar.addPanel(bookmarkTitle, bookmarkUrl,);

    } else if( window.external || document.all) { // For IE Favorite

        window.external.AddFavorite( bookmarkUrl, bookmarkTitle);

    } else if(window.opera) { // For Opera Browsers

        $(a.jQueryBookmark).attr(href,bookmarkUrl);

        $(a.jQueryBookmark).attr(title,bookmarkTitle);

        $(a.jQueryBookmark).attr(rel,sidebar);

    } else { // for other browsers which does not support

         alert('Your browser does not support this bookmark action');

         return false;

    }

  });

});

</script>

This Code is taken from Developersnippets!

/e:

Chrome does not support such actions, since the security level could be broken.