用javascript如何實現讀取該頁url並收藏?

// <![CDATA[

function bookmark(){

var title=document.title

var url=document.location.href

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);

}

// ]]>

</script>

<!--加入收藏夾--><div class="listText"><a href="javascript:bookmark()">加入收藏夾</a><textarea name="txt" id="txt" onClick="javascript:copyCode(this)" class="copycode" rows="1" cols="62">/articles/sex/index.html</textarea></div>