Removes the Internet Explorer cache mechanism and obtains the latest data from the server in real time.

Add the following code to the head of the HTML page:

<meta http-equiv="Pragma" content="no-cache">   <meta http-equiv="Cache-Control" content="no-cache"><meta http-equiv="Expires" content="0">

When Ajax sends a request, the URL keeps up with a timestamp.

   function convertURL(url){//这个方法返回毫秒级别的数据，可以说是唯一的        if(url){            var timeStamp = (new Date()).valueOf();            var tempArray  = url.split("?");            var tempArrayLength = tempArray.length;            if(tempArrayLength==2){                //将时间戳追加到url上面                url = url+ "&timeStamp=" +timeStamp;            }else if(tempArrayLength==1){                url = url+ "?timeStamp=" +timeStamp;            }            return url;        }    }

Removes the Internet Explorer cache mechanism and obtains the latest data from the server in real time.