<div><b?id="oldnode">JavaScript</b>是一個很常用的技術，為網頁添加動態(tài)效果。</div>
??<a?href="javascript:replaceMessage()">?將加粗改為斜體</a>??
????<script?type="text/javascript">
??????function?replaceMessage(){
??????????var?newnode?=?document.createElement("i");
??????????var?newnodeText?=?document.createTextNode("JavaScript");
	??newnode.appendChild(newnodeText);
??????????//newnode.innHTML?=?"JavaScript";
??????????//console.log(newnode);
??????????var?oldnode?=?document.getElementById("oldnode");
	??oldnode.parentNode.replaceChild(newnode,oldnode);
???????}