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");
        }
    }
}
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);
        }
    }
}