<script type="text/javascript"> var div = document.createElement("div"); var a = document.createElement("a"); var span = document.createElement("span"); a.href = "http://www.baidu.com"; span.innerHTML = "baidu"; a.appendChild(span); div.appendChild(a); document.body.appendChild(div); </script>
//结果
<div>
<a href="http://www.baidu.com"><span>baidu</span></a>
</div>