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function addfavorite(){//加入收藏  
   if (document.all){  
      window.external.addFavorite("http://"+document.location.host+"/",document.title);  
   }else if (window.sidebar){  
      window.sidebar.addPanel(document.title,"http://"+document.location.host+"/", "");  
   }  
}  
//设为首页IE下可以，其他浏览器不稳定。  
function addhomepage(){if(document.all){document.body.style.behavior='url(#default#homepage)';document.body.setHomePage('http://'+document.location.host+'/');}else{document.body.setHomePage('http://'+document.location.host+'/');}}  
 
//推荐使用。  
function SetHomepage(){//设为首页  
   if(document.all){  
      document.body.style.behavior="url(#default#homepage)";  
      document.body.setHomePage("http://"+document.location.host+"/");  
   }  
   else if(window.sidebar){  
        if(window.netscape){  
             try{  
                 netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
             }  
             catch(e){  
                 alert("您的浏览器未启用[设为首页]功能，开启方法：先在地址栏内输入about:config,然后将项 signed.applets.codebase_principal_support 值该为true即可");  
             }  
        }  
        var prefs=Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);  
        prefs.setCharPref("browser.startup.homepage","http://"+document.location.host+"/");  
   }  
}