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        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <meta charset="utf-8">
  <title>EduCoder 500 error</title>
  <link type="text/css" rel="stylesheet" href="/stylesheets/educoder/edu-main.css" />
  <link href="//at.alicdn.com/t/font_653600_rr8l5v2aaym.css" rel="stylesheet" type="text/css"/>
  <script src="/javascripts/jquery-1.8.3-ui-1.9.2-ujs-2.0.3.js"></script>

  <style type="text/css">
    body {
      font-family: "微软雅黑","宋体";
      background: #fff;
    }
    h1 {
      font-size: 1.5em;
    }
    p {
      font-size: 0.8em;
    }
    .h_content{
      text-align: center;
      padding-top: 15px;
    }
    .font_h{
      font-size: 24px;
      color: #ff0077;
    }
    .verticalCenter{
      height: 100%;
      justify-content: center;
      align-items: center;
      display: -webkit-flex;
    }
  </style>
  <script type="text/javascript">
    $(function(){
      if(window.history.length == 1)
      {
        $("#history_back").css("color","#CCC");
        $("#history_back").css("cursor","default");
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    });
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</head>
<body>
<!-- <h1>Internal error</h1>
<p>An error occurred on the page you were trying to access.<br />
If you continue to experience problems please contact your Trustie administrator for assistance.</p>
<p>If you are the Trustie administrator, check your log files for details about the error.</p> -->
<div class="verticalCenter">
  <div class="edu-txt-center">
    <img src="/images/warn/pic_500.jpg" >
    <p class="font-18 mt40">您可以稍后尝试&nbsp;
      您可以稍后尝试&nbsp;<a href="javascript:history.back()" class="color-blue">返回上页</a>,或者&nbsp;
      <a target="_blank" href="//shang.qq.com/wpa/qunwpa?idkey=2f2043d88c1bd61d182b98bf1e061c6185e23055bec832c07d8148fe11c5a6cd" class="color-blue">QQ反馈>></a>
    </p>
  </div>
</div>
</body>
</html>