//解决浏览器缓存function timestamp(url){

    //  var getTimestamp=Math.random();

      var getTimestamp=new Date().getTime();

     if(url.indexOf("?")>-1){

       url=url+"&timestamp="+getTimestamp

     }else{

       url=url+"?timestamp="+getTimestamp

     }

     return url;    }

  

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