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<DIV class=pt10><B>8.2.4.6 修改元素</B></DIV>
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<P>元素内容的改变包括元素名称、元素属性、元素所包含的文本内容等项目的改变。下面仅就元素所包含的文本内容的改变给出一个范例，其他内容的改变实现方法与此类似。</P>
<P>假如想把张三的电子邮件地址更改为zhs@pku.edu.cn，通过下列语句就可以实现：</P>
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<TD width="100%">node = root.childNodes.item(0)<BR>emailNode =
node.childNodes.item(0)<BR>emailNode.childNodes.item(0).nodeValue =
zhs@pku.edu.cn</TD></TR></TBODY></TABLE></CENTER></DIV>
<P>下面给出了修改后的效果：</P><FONT face=宋体 size=3>
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src="image/TU000000-0802-0406-01.gif" width=501></FONT></P>
<P
align=left>至此，我们已经把对DOM树的常用操作做了简单的介绍。一般说来，支持DOM的XML分析器通常会对DOM做一些扩展，这些扩展不属于DOM规范中的标准，但却给DOM树的操作带来了方便，不同的分析器所做的扩展也不尽相同，可以通过查询相关技术支持资料或者帮助来获取更多的信息。<BR></P></DIV>
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