动态加载js脚本

(function () { var hm = document.createElement("script"); hm.src = "/js/jsver.js?_t=" + Da

(function () {            var hm = document.createElement("script");            hm.src = "/js/jsver.js?_t=" + Date.now();            var s = document.getElementsByTagName("script")[0];            s.parentNode.insertBefore(hm, s);        })();