万恶的ie，让开发困难重重，干脆不支持好了！
下面直接阻止老旧的ie访问，
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>title</title>
<meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
<!--[if lt IE 12]>
<script type="text/javascript">
document.write('<div style="position: absolute; z-index: 1000; top: 0px; left: 0px;width: 100%; height: 100%; background: white; text-align: center;"><h1 style="top: 48%; position: relative;"><font color="#15428B">不支持IE11及以下浏览器，请使用chrome！</font></h1></div>');
//阻止浏览器继续加载后续文件
if (!!(window.attachEvent && !window.opera)) {
document.execCommand("stop"); //IE
} else {
window.stop(); //Firefox chrome
}
</script>
<![endif]-->
</head>这下世界清静了！
