<div id="tips" class="center-block">
                <h5 class="tips_head">
                  <u>遇到问题？</u>
                </h5>
                <div class="tips_content">
                  <ol>
                    <li>Ctrl+F5刷新本页面</li>
                    <li>关闭页面，重新加载本页面和登录</li>
                    <li>更换浏览器（建议使用火狐和谷歌浏览器）</li>
                    <li>联系我们 </li>
                  </ol>
                </div>
              </div>

    $(function() { //遇到问题的弹出文字
      $("#tips h5.tips_head").bind("click", function() {
        var $tips_content = $(this).next("div.tips_content");
        if ($tips_content.is(":visible")) {
          $tips_content.hide();
        } else {
          $tips_content.show();
        }
      })
    })

.tips_head { 
  padding-left:20px; 
  cursor: pointer ;
  text-align:left;
  margin-top:20px;
  color:red;}

.tips_content { 
  padding: ; 
  border-top: 1px solid #0050D0;
  display:block;
  display:none;
  text-indent: 2em;
  text-align:left; }