在线运行代码 - 代码学院 www.codexy.cn

<!DOCTYPE html>
<html>
<head>
<script src="loadxmldoc.js"> 
</script>
</head>
<body>
<script>
// 获取元素节点的上一个同级节点
function get_previoussibling(n)
{
	x=n.previousSibling;
	while (x.nodeType!=1)
	{
		x=x.previousSibling;
	}
	return x;
}

xmlDoc=loadXMLDoc("books.xml");

x=xmlDoc.getElementsByTagName("author")[0];
document.write(x.nodeName);
document.write(" = ");
document.write(x.childNodes[0].nodeValue);

y=get_previoussibling(x);

document.write("<br>Previous sibling: ");
document.write(y.nodeName);
document.write(" = ");
document.write(y.childNodes[0].nodeValue);
</script>
</body>
</html>
源代码

动行结果
