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("抱歉！您的浏览器不支持直接设为首页。请在浏览器地址栏输入“about:config”并回车然后将 [signed.applets.codebase_principal_support]设置为“true”，点击“加入收藏”后忽略安全提示，即可设置成功。");
  }
  var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
  prefs.setCharPref('browser.startup.homepage',vrl);
  }
  }
 } 

 function bookmark(){
  var title=top.document.title;
  var url=top.location.href;
  try
  {
  window.external.AddFavorite( url, title);
  }
   catch (e)
   {
   try
   {
   window.sidebar.addPanel(title, url,"");
   }
   catch (ex)
   {
  
   alert("加入收藏失败，有劳您手动添加。");
   }
   }
   }