原生javascript提示浏览器升级插件
<script>
//IE outdate friendly warning if you don't want remove it
var $buoop = {vs:{i:8,f:3.6,o:10.6,s:3.2,n:9}}
$buoop.ol = window.onload;
window.onload=function(){
try {if ($buoop.ol) $buoop.ol();}catch (e) {}
var e = document.createElement("script");
e.setAttribute("type", "text/javascript");
e.setAttribute("src", "http://browser-update.org/update.js");
document.body.appendChild(e);
}
</script>
效果如下：
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关键字：
javascript ajax XMLHttpRequest responseType onreadystatechange readyState