JAVASCRIPT

Retrieving More Hardware Information With Internet Explorer and JavaScript

This is the fourth and last article in this series, which focuses on retrieving hardware information using JavaScript and presenting it on a web page. You can directly copy and paste the code samples present in this article into a file with the extension “.htm” and open them in Internet Explorer 5.5+.

Author Info:

By: Jagadish Chaterjee

Poor Best

Rating:

/ 11

May 09, 2006

TABLE OF CONTENTS:

· Retrieving More Hardware Information With Internet Explorer and JavaScript
· How to list the BUS information available in a computer using JavaScript
· How to list the memory (RAM) information available in a computer using JavaScript
· How to retrieve sound device information available in a computer using JavaScript
· How to retrieve the printer driver information available in a computer using JavaScript
· Another way to retrieve printer driver information available in a computer using JavaScript
· How to retrieve the serial port information available in a computer using JavaScript

<!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">
<!--

functionButton1_onclick() {
      var locator = new ActiveXObject ("WbemScripting.SWbemLocator");
      var service = locator.ConnectServer(".");
      var properties = service.ExecQuery("SELECT * FROM Win32_SerialPort");
      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.Name + "</td>");
            document.write("<td>" + p.ProviderType + "</td>");
document.write("<td>" + p.Description + "</td>");
document.write("<td>" + p.MaxBaudRate + "</td>");
            document.write("</tr>");
      }
      document.write("</table>");
}

functiondispHeading()
{
      document.write("<thead>");
      document.write("<td>Name</td>");
      document.write("<td>ProviderType</td>");
      document.write("<td>Description</td>");
      document.write("<td>MaxBaudRate</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 would automatically list all serial ports available (along with their properties) on the client computer. To retrieve this information, I used a built-in class, “Win32_SerialPort.” Actually, the class has several properties. I listed only the most important ones.

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

Any comments, suggestions, bugs, errors, feedback etc. are highly appreciated at jag_chat@yahoo.com.

DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware.