JavaScript Set Homepage and Favorite

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// 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);         }     } }