JAVASCRIPT

How to Use JavaScript to Find Hardware Information

This article mainly concentrates on retrieving the hardware information of a system. All of the examples in this article can be directly tested, by simply copying and pasting the entire code (of each section) in any text file with the extension .HTM and opening the file using Microsoft Internet Explorer (preferably 5.5+).

Author Info:

By: Jagadish Chaterjee

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April 11, 2006

TABLE OF CONTENTS:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
      <head>
            <title></title>
            <meta name="GENERATOR" content="Microsoft Visual Studio .NET
7.1">
            <meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5">
      <script id=clientEventHandlersJS language=javascript>
<!--

function Button1_onclick() {
      var locator = new ActiveXObject ("WbemScripting.SWbemLocator");
      var service = locator.ConnectServer(".");
      var properties = service.ExecQuery("SELECT * FROM
Win32_CDROMDrive");
      var e = new Enumerator (properties);
      document.write("<table border=1>");
      for (;!e.atEnd();e.moveNext ())
      {
            var p = e.item ();
            document.write("<tr>");
            document.write("<td>" + p.Caption + "</td>");
            document.write("<td>" + p.Description + "</td>");
            document.write("<td>" + p.Drive + "</td>");
            document.write("<td>" + p.Status + "</td>");
            document.write("<td>" + p.MediaLoaded + "</td>");
            document.write("</tr>");
      }
      document.write("</table>");
}

//-->
</script>
</head>
      <body>
            <INPUT id="Button1" type="button" value="Button"
name="Button1" language=javascript onclick="return Button1_onclick()">
      </body>
</html>

The above code would automatically list all the information related to the CD-ROM drive. To retrieve CD-ROM drive information, I used the built-in class “Win32_CDROMDrive.” The class internally has a lot of properties, methods and events. But, in the above example we concentrated only on the properties “Description,” “Drive,” “Status” and other properties related to the “Win32_CDROMDrive” class.

The “for” loop I used in the above code iterates for every CD-ROM drive present in the system and finally retrieves only the properties of that drive.

Next: How to retrieve floppy drive information using JavaScript >>