javaScript Set Homepage and Favorite

// Javascript Set Homepage and Favorite// <a href="javascript:AddFavorite(window.location,document.title)">加入收藏</a>//It calls the Add Favorite dialog box in IE and links to a url in Firefox and Safari (but again not Opera ). Geovin Du//http://stackoverflow.com/questions/946189/how-can-i-set-default-homepage-in-ff-and-Chrome-via-javascript//http://www.webdeveloper.com/forum/showthread.php?180428-Set-homepage-script//IE 11.0 Windows7 无效.function AddFavorite(sURL, sTitle) {    try {        window.external.addFavorite(sURL, sTitle);    }    catch (e) {        try {            window.sidebar.addPanel(sTitle, sURL, "");        }        catch (e) {            alert("加入收藏失败，请使用Ctrl+D进行添加");        }    }}//<a href="#" onclick="javascript:SetHome(this,window.location);" >设为首页</a>//function SetHome(obj, vrl) {    try {        obj.style.behavior = 'url(#default#homepage)'; obj.setHomePage(vrl);    }    catch (e) {        if (window.netscape) {            try {                netscape.security.PRivilegeManager.enablePrivilege("UniversalXPConnect");            }            catch (e) {                alert("此操作被浏览器拒绝！/n请在浏览器地址栏输入“about:config”并回车/n然后将 [signed.applets.codebase_principal_support]的值设置为'true',双击即可。");            }            var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);            prefs.setCharPref('browser.startup.homepage', vrl);        }    }}