HTML中获取某标签的父结点和内容

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>获取标签的父结点和内容</title>
<script>
    function click_event(){
            var im_content=document.getElementsByClassName('talk_time');
              alert(im_content[0].parentNode);  //获取父节点
          alert(im_content[0].parentNode.innerHTML);  //获取父节点的内容
   }
</script>
</head>
<body>
            <div class="talk_recordboxmine">
                <div class="user"  onclick='click_event()'>
                    <img src="img/taobao.png">11
                </div>
                    <div class="talk_recordtext">
                        <h3>qqq</h3>
                        <span class="talk_time" time_date="1531534632009">10:17</span>
                    </div>
            </div>
</body>
</html>
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