1.清空页面缓存
<META HTTP-EQUIV="pragma" CONTENT="no-cache">
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
<META HTTP-EQUIV="expires" CONTENT="0">
2.清空JS文件缓存(加时间戳)
<script type="text/javascript" src="/static/js/word-single-pro.js?r=New Date().getTime()"></script>