JAVASCRIPT

Retrieving Hardware Information using Advanced JavaScript with Internet Explorer

This is the third article in a series focusing on retrieving hardware information using JavaScript and presenting the same on a web page. You can directly copy and paste the code samples presented in this article into a file with the extension “.htm” and open in Internet Explorer 5.5+.

Author Info:

By: Jagadish Chaterjee

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May 02, 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_FloppyController");
      var e = new Enumerator (properties);
      document.write("<table border=1>");
      dispHeading();
      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.DeviceID + "</td>");
            document.write("<td>" + p.Manufacturer + "</td>");
            document.write("<td>" + p.Name + "</td>");
            document.write("<td>" + p.PNPDeviceID + "</td>");
            document.write("<td>" + p.Status + "</td>");
            document.write("<td>" + p.SystemName + "</td>");
            document.write("<td>" + p.TimeOfLastReset + "</td>");
            document.write("</tr>");
      }
      document.write("</table>");
}

function dispHeading()
{
      document.write("<thead>");
      document.write("<td>Caption</td>");
        document.write("<td>Description</td>");
        document.write("<td>DeviceID</td>");
      document.write("<td>Manufacturer</td>");
      document.write("<td>Name</td>");
        document.write("<td>PNPDeviceID</td>");
        document.write("<td>Status</td>");
      document.write("<td>SystemName</td>");
        document.write("<td>TimeOfLastReset</td>");
      document.write("</thead>");
}

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

The above sample would automatically list all floppy controllers belonging to a computer. It mainly lists the device id, manufacturer, PNPDeviceID, status and other relevant information. To make the above sample simple, I listed only the most important information. You can retrieve much more information. To retrieve this information, I used a built-in class, “Win32_FloppyController.”

The “for” loop I used in the above code iterates for every floppy controller present in the system and finally retrieves only the properties of that floppy controller.

Similarly, to work with floppy drives, you can use Win32_FloppyDrive class with the following properties: Caption, DeviceID, Manufacturer, PNPDeviceID, Status, and so on.

Next: How to retrieve a computer's keyboard information using JavaScript >>