拖拉机

// (function(){ var bp = document.createElement("script"); var curProtocol = window.location.protocol.split(":")[0]; if (curProtocol ==="https"){ bp.src = "https://zz.bdstatic.com/linksubmit/push.js"; } else{ bp.src = "http://push.zhanzhang.baidu.com/push.js"; } var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(bp, s); })();