Ajax的IE缓存问题
Ajax的IE缓存问题，会造成用open时用get方法不能重复提交。解决的办法有以下几种：1.客户端在url后添加随机数.
new Date().getTime()或者Math.Random()
或者送请求前加上
XMLHttpRequest.setRequestHeader("If-Modified-Since","0")
或者用post方法提交
2.服务器端禁用缓存.
response.setHeader("Pragma","No-cache");response.setHeader("Cache-Control","no-cache");response.setDateHeader("Expires", 0);
Response.AddHeader("pragma", "no-cache");Response.AddHeader("cache-control", "no-cache");Response.AddHeader("expires", "0");
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