// JavaScript Document
//  加入收藏 <a onclick="AddFavorite(window.location,document.title)">加入收藏</a>
      
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");
        }
    }
}
//设为首页 <a onclick="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);
                 }
        }
}

<a href="#" onclick="SetHome(this,window.location)">设为首页</a>  
<a href="#" onclick="AddFavorite(window.location,document.title)">收藏本站</a>

Via：http://www.cnblogs.com/naniannayue/archive/2011/12/16/2289798.html