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JAVASCRIPT

Retrieving Hardware Information using Advanced JavaScript with Internet Explorer
By: Jagadish Chaterjee
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    2006-05-02

    Table of Contents:
  • Retrieving Hardware Information using Advanced JavaScript with Internet Explorer
  • How to dig out a computer's processor information using JavaScript
  • How to retrieve a computer's motherboard information using JavaScript
  • How to retrieve a computer's floppy controller information using JavaScript
  • How to retrieve a computer's keyboard information using JavaScript

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    Retrieving Hardware Information using Advanced JavaScript with Internet Explorer - How to dig out a computer's processor information using JavaScript


    (Page 2 of 5 )

    Now, let us try to develop a simple script (JavaScript) which shows the technique for retrieving a list of processors and their information related to a computer. The entire code for the sample is as follows:

    <!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_Processor");
          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.Availability + "</td>");
                document.write("<td>" + p.Caption + "</td>");
                document.write("<td>" + p.CpuStatus + "</td>");
                document.write("<td>" + p.CurrentClockSpeed + "</td>");
                document.write("<td>" + p.DeviceID + "</td>");
                document.write("<td>" + p.Level + "</td>");
                document.write("<td>" + p.Name + "</td>");
                document.write("<td>" + p.ProcessorId + "</td>");
                document.write("<td>" + p.ProcessorType + "</td>");
                document.write("<td>" + p.SystemName + "</td>");
                document.write("</tr>");
          }
          document.write("</table>");
    }

    function dispHeading()
    {
          document.write("<thead>");
          document.write("<td>Availability</td>");
            document.write("<td>Caption</td>");
            document.write("<td>CpuStatus</td>");
          document.write("<td>CurrentClockSpeed</td>");
          document.write("<td>DeviceID</td>");
            document.write("<td>Level</td>");
            document.write("<td>Name</td>");
          document.write("<td>ProcessorId</td>");
          document.write("<td>ProcessorType</td>");
          document.write("<td>SystemName</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 processors belonging to a computer. It mainly lists the Device ID, name, processor ID, caption, status and other relative properties. In fact, it has several other properties. Just to keep this sample simple, I listed only the ones most used. To retrieve this information, I used a built-in class, “Win32_Processor.” 

    The “for” loop I used in the above code iterates for every processor present in the system and finally retrieves only the properties of that processor. The above sample even works for a multi-processor system.

    I suggest you refer to MSDN if the values returned by the above program confuse you.

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