var url="http://www.downcordoba.org";  
var titulo="Down Córdoba";
function agregar(){ 
//if (document.all) 
//window.external.AddFavorite(url,titulo) 
//}
	if (window.sidebar&&window.sidebar.addPanel){
		window.sidebar.addPanel(titulo,url,"");
	} else if (document.all) {
		window.external.AddFavorite(url,titulo);
	}
}