systemId property

Gets the system identifier of a document type.

Document Object Model (DOM) Level 3 Core Specification, Section 1.5Internet Explorer 9

 

Syntax

JavaScript

p = object.systemId

 

Property values

Type: String

The system identifier

Standards information

Remarks

The value of the systemId property corresponds to the URL attribute of a !DOCTYPE directive.

Examples

The following example shows the systemId property with respect to a !DOCTYPE directive.


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
  "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
  <title>IE9 Doctype Sample: SystemId</title>
  <meta name="x-ua-compatible" content="ie=9">
  <script type="text/javascript">
  function showInfo() {
    var s = document.doctype.systemId;
    // Displays "http://www.w3.org/TR/html4/strict.dtd"
    alert( s );
  }
  </script>
  </head>
  <body>
  <button onclick="showInfo();">Click Me!</button>
  </body>
</html>

See also

documentType
Reference
name
publicId

 

 

Show:
© 2014 Microsoft