DOM Element物件getAttributeNode()方法

DOM Element物件getAttributeNode()方法從當前元素中提供屬性節點的名稱。

語法

以下是getAttributeNode()方法的使用語法。

elementObj.getAttributeNode(name)

引數

name - 包含要檢索的屬性名稱。

返回值

如果存在，此方法將屬性節點的值作為字串返回，否則返回為null。

範例

檔案：node.xml 的內容如下 -

<?xml version = "1.0" encoding = "UTF-8" standalone = "no" ?>
<Company> 
   <Employee category = "Technical" id = "firstelement"> 
      <FirstName>Susen</FirstName> 
      <LastName>Su</LastName> 
      <ContactNo>1584567890</ContactNo> 
      <Email>[email protected]</Email> 
   </Employee>  

   <Employee category = "Non-Technical"> 
      <FirstName>Max</FirstName> 
      <LastName>Su</LastName> 
      <ContactNo>1334667898</ContactNo> 
      <Email>[email protected]</Email> 
   </Employee>  

   <Employee category = "Management"> 
      <FirstName>Min</FirstName> 
      <LastName>Su</LastName> 
      <ContactNo>1364562350</ContactNo> 
      <Email>[email protected]</Email> 
   </Employee> 
</Company>

以下範例演示了getAttributeNode()方法的用法 -

<!DOCTYPE html>
<html>
   <meta charset="utf-8"/>
   <head>
      <script>
         function loadXMLDoc(filename) {
            if (window.XMLHttpRequest) {
               xhttp = new XMLHttpRequest();
            } else // code for IE5 and IE6 
            {
               xhttp = new ActiveXObject("Microsoft.XMLHTTP");
            }
            xhttp.open("GET",filename,false);
            xhttp.send();
            return xhttp.responseXML;
         }
      </script>
   </head>
   <body>
      <script>
         xmlDoc = loadXMLDoc("/node.xml");

         x = xmlDoc.getElementsByTagName('Employee');
         document.write("顯示所有屬性節點: ");
         document.write("<br>");
         for(i = 0;i < x.length;i++) {
            y = x.item(i).getAttributeNode("category");
            document.write(y.name);
            document.write(" = ");
            document.write(y.value);
            document.write("<br>");
         }
      </script>
   </body>
</html>

執行上面範例程式碼，得到以下結果 -