function bookmark(){
var title="Opera"
var url="http://www.opera.com/"

if (window.sidebar) window.sidebar.addPanel(title, url,"");

else if( window.opera && window.print )
{
var mbm = document.createElement('a');
mbm.setAttribute('rel','sidebar');
mbm.setAttribute('href',url);
mbm.setAttribute('title',title);
mbm.click();
}

else if( document.all ) window.external.AddFavorite( url, title);

}