既然说替换节点，那么旧的节点为何添加不了

源自：9-15 替换元素节点replaceChild()

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<head>

<title>无标题文档</title>

</head>

<body>

<div><b id="oldnode">JavaScript</b>是一个很常用的技术，为网页添加动态效果。</div>

<a href="javascript:replaceMessage()"> 将加粗改为斜体</a>

function replaceMessage(){

var newnode=document.createElement("i");

var newnodeText=document.createTextNode("javaScript");

newnode.appendChild(newnodeText);

var oldnode=document.getElementById("oldnode");

oldnode.parentNode.replaceChild(newnode,oldnode);

var oldnodeText=document.createTextNode("nihahahha");

oldnode.appendChild(oldnodeText);

}

</script>

</body>

</html>

提问者：李逍遥lh 2016-08-20 14:42