DOM - 节点对象属性 - previousSibling
属性 previousSibling 指定当前节点前一个节点。
语法
以下是使用 previousSibling 属性的语法。
nodeObject.previousSibling
示例
node.xml 内容如下 −
<?xml version = "1.0"?>
<Company>
<Employee category = "Technical">
<FirstName>Tanmay</FirstName>
<LastName>Patil</LastName>
<ContactNo>1234567890</ContactNo>
<Email>tanmaypatil@xyz.com</Email>
</Employee>
<Employee category = "Non-Technical">
<FirstName>Taniya</FirstName>
<LastName>Mishra</LastName>
<ContactNo>1234667898</ContactNo>
<Email>taniyamishra@xyz.com</Email>
</Employee>
<Employee category = "Management">
<FirstName>Tanisha</FirstName>
<LastName>Sharma</LastName>
<ContactNo>1234562350</ContactNo>
<Email>tanishasharma@xyz.com</Email>
</Employee>
</Company>
以下示例演示了 previousSibling 属性的用法 −
<!DOCTYPE html>
<html>
<body>
<script>
if (window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
} else {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","/dom/node.xml",false);
xmlhttp.send();
xmlDoc = xmlhttp.responseXML;
function get_previousSibling(p) {
a = p.previousSibling;
while (a.nodeType != 1) {
a = a.previousSibling;
}
return a;
}
x = get_previousSibling(xmlDoc.getElementsByTagName("Email")[0]);
document.write("Previous sibling of Email is : ");
document.write(x.nodeName);
</script>
</body>
</html>
执行
将此文件保存为服务器路径上的 nodeattribute_previoussibling.html(此文件和 node.xml 应位于服务器中的同一路径)。我们将获得如下所示的输出 −
Previous sibling of Email is : ContactNo
dom_node_object.htm
