解释一段代码
<html>
<head>
<script type="text/javascript" src="/example/xdom/loadxmldoc.js">
</script>
</head>
<body>
<script type="text/javascript">
xmlDoc=loadXMLDoc("/example/xdom/books.xml");
var x=xmlDoc.getElementsByTagName('book');
var newel,newtext
for (i=0;i<x.length;i++)
{
newel=xmlDoc.createElement('edition');
newtext=xmlDoc.createTextNode('First');
newel.appendChild(newtext);
x[i].appendChild(newel);
}
//Output all titles and editions
var y=xmlDoc.getElementsByTagName("title");
var z=xmlDoc.getElementsByTagName("edition");
for (i=0;i<y.length;i++)
{
document.write(y[i].childNodes[0].nodeValue);
document.write(" - Edition: ");
document.write(z[i].childNodes[0].nodeValue);
document.write("<br />");
}
</script>
</body>
</html>
结果
Harry Potter - Edition: First
Everyday Italian - Edition: First
Learning XML - Edition: First
XQuery Kick Start - Edition: First
edition为什么变成Edition了childNodes[0]这里的[0]去掉就出现错误，不知道原因
[解决办法]
edition这是个元素
Edition看这句document.write(" - Edition: ");
childNodes不加[0]返回的是节点列表
