javascript 拷贝节点cloneNode()使用介绍

<div id="guoDiv"> 
<span>1</span> 
<span>2</span> 
<span>3</span> 
</div> 
var oDiv = document.getElementById("guoDiv"); 
var deepList = oDiv.cloneNode(true); //拷贝子节点 
alert(deepList.childNodes.length); //3或7(兼容性问题,所以结果不一样) 
var showList = oDiv.cloneNode(false); //只拷贝当前元素的引用 
alert(showList.childNodes.length); //0