var bookmark = {
  init : function (){
    if(window.sidebar || (window.opera && window.print) || document.all)
    {
      document.getElementById("bookmark").style.display = "block";
      YAHOO.util.Event.on("bookmark", "click", bookmark.execute);
    }
  },
  execute : function (e){
    YAHOO.util.Event.preventDefault(e);
    if (window.sidebar) // firefox
    	window.sidebar.addPanel(document.title, window.location.href, "");
    else if(window.opera && window.print){ // opera
    	var elem = document.createElement('a');
    	elem.setAttribute('href',window.location.href);
    	elem.setAttribute('title',document.title);
    	elem.setAttribute('rel','sidebar');
    	elem.click();
    }
    else if(document.all)// ie
    	window.external.AddFavorite(window.location.href, document.title);
  }
}


YAHOO.util.Event.onAvailable("bookmark", bookmark.init);