Javascript 擷取LI裡的內容

複製代碼 代碼如下:<strong>資料來源:</strong>
<ul>
<li>指令碼之家</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>取外層ul的li資訊:</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>取內層ul的li資訊:</strong><br>");

var tree2 = document.getElementsByTagName("ul")[1].childNodes;
for (var i = 0;i < tree2.length;i++){
document.write(tree2[i].innerHTML);
}

</script>