复制代码 代码如下:

<strong>数据源:</strong>

<ul>

<li>查字典教程网</li>

<ul>

<li>a_1</li>

<li>a_2</li>

<li>a_3</li>

</ul>

<li>www.jb51.net</li>

<li>www.kanshule.com</li>

</ul>

<script>

document.write("<strong>取外层ul的li信息:</strong><br>");

var tree1 = document.getElementsByTagName("ul")[0].childNodes;

for (var i = 0;i < tree1.length;i++){

document.write(tree1[i].innerHTML);

}

document.write("<br><br><strong>取内层ul的li信息:</strong><br>");

var tree2 = document.getElementsByTagName("ul")[1].childNodes;

for (var i = 0;i < tree2.length;i++){

document.write(tree2[i].innerHTML);

}

</script>