How to Use JavaScript to Find Hardware Information - How to retrieve floppy drive information using JavaScript
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Now, let us try to develop a simple script (JavaScript) which shows the technique for retrieving the CD-ROM information on a web page. 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_FloppyDrive");
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.Description + "</td>");
document.write("<td>" + p.DeviceID + "</td>");
document.write("<td>" + p.Status + "</td>");
document.write("<td>" + p.Manufacuturer + "</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 floppy drive. To retrieve floppy drive information, I used the built-in class “Win32_FloppyDrive.” The class internally has a lot of properties, methods and events. But in the above example we concentrated only on the properties “Description,” “DeviceID,” “Status” and other properties related to the “Win32_FloppyDrive” class.
The “for” loop I used in the above code iterates for every floppy drive present in the system and finally retrieves only the properties of that drive.
Any comments, suggestions, ideas, improvements, bugs, errors, feedback etc. are highly appreciated at jag_chat@yahoo.com.
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