DOM - Notation 物件屬性 - systemId



Notation 的系統識別符號,如果沒有指定系統識別符號,則為 null。

語法

以下是使用 systemId 屬性的語法。

var sysid = document.doctype.systemId;

示例

notation_xhtml.xml 內容如下 −

<?xml version = "1.0" encoding = "UTF-8" standalone = "no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<address>
   <name>Tanmay Patil</name >
   <company>TutorialsPoint</company>
   <phone>(011) 123-4567</phone>
</address>

以下是 systemId 屬性用法示例 −

<!DOCTYPE html>
<html>
   <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("/dom/notation_xhtml.xml");
         document.write("The systemId asscoiated with the notation is:"+ xmlDoc.doctype.systemId);
      </script>
   </body>
</html>

執行

將此檔案作為 notationattribute_systemsid.html 儲存到伺服器路徑(此檔案和 notation.xml 應位於伺服器上的同一路徑中)。我們會得到如下輸出 −

The systemId asscoiated with the notation is:http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd 
dom_notation_object.htm
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