<body>
<ul id='ul'>
<li>1</li>
<li>1</li>
<li>1</li>
</ul>
<script>
function clearText(){
var UL = document.getElementById('ul');
var li1 = UL.firstChild;
document.write(UL.childNodes.length);
UL.removeChild(UL.firstChild);
document.write(UL.childNodes.length);
}
</script>
<button onclick="clearText()">清除节点内容</button>
</body>
当点击按钮是说没有权限
开心就好OO