function addFav(){   // 加入收藏夹
if (document.all) {
   window.external.addFavorite(window.location.href, document.title);
} else if (window.sidebar) {
   window.sidebar.addPanel(document.title, window.location.href, "");
}
}
function setHomepage(){   // 设置首页
if (document.all) {
   document.body.style.behavior = 'url(#default#homepage)';
   document.body.setHomePage(window.location.href);
} else if (window.sidebar) {
   if (window.netscape) {
    try {
     netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
    } catch(e) {
     alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true");
    }
   }
var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
   prefs.setCharPref('browser.startup.homepage', window.location.href);
}
}