function addBookmark(title, url)
{
	if (title == undefined) {
		title = document.title;
  }

	if (url == undefined) {
		url = top.location.href;
  }

	if (window.sidebar) { // firefox
		window.sidebar.addPanel(title, url, '');
  } else if(window.opera && window.print) { // opera
		var elem = document.createElement('a');
		elem.setAttribute('href',url);
		elem.setAttribute('title',title);
		elem.setAttribute('rel','sidebar');
		elem.click();
	} 
	else if(document.all) { // ie
		window.external.AddFavorite(url, title);
	} else if (navigator.appName=="Netscape") {//Netscape
		alert('Para agregar a Favoritos/Marcadores prsione "Ctrl+D".');
  }	else {
		alert('Tu navegador no tiene esta opcion.');
  }
}