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Retrieving More Hardware Information With Internet Explorer and JavaScript - How to list the memory (RAM) information available in a computer using JavaScript
(Page 3 of 7 )

Now, let us try to develop a simple script (JavaScript) which shows the technique for retrieving memory information available in 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">
<!--

functionButton1_onclick() { 
      var locator = new ActiveXObject ("WbemScripting.SWbemLocator"); 
      var service = locator.ConnectServer("."); 
      var properties = service.ExecQuery("SELECT * FROM in32_MemoryDevice"); 
      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.DeviceID + "</td>"); 
            document.write("<td>" + p.StartingAddress + "</td>"); 
            document.write("<td>" + p.EndingAddress + "</td>"); 
            document.write("<td>" + p.SystemName + "</td>"); 
            document.write("</tr>"); 
      } 
      document.write("</table>");
}

functiondispHeading()
{ 
      document.write("<thead>"); 
      document.write("<td>DeviceID</td>"); 
      document.write("<td>StartingAddress</td>"); 
      document.write("<td>EndingAddress</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 would automatically list memory information belonging to a computer.  It mainly lists the device id, starting address, ending address and system name. To retrieve this information, I used a built-in class, “Win32_MemoryDevice.” 

The “for” loop I used in the above code iterates for every memory device (or RAM) present in the system and finally retrieves only the properties of that memory device.


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