在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<script src="loadxmldoc.js.html"> 
</script>
</head>
<body>

<script>
xmlDoc=loadXMLDoc("books_cdata.xml");

x=xmlDoc.getElementsByTagName("html")[0].childNodes[0]

y=x.substringData(3,4);

document.write(x.nodeValue);
document.write("<br>");
document.write(y);
</script>
</body>
</html>

源代码

动行结果