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Bharathi Cherukuri
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16120		Niladri.Biswas
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How to detect the operating system on the client machine ?

Interview question and answer by: Bharathi Cherukuri | Posted on: 6/18/2012 | Category: JavaScript Interview questions | Views: 1165 | | Points: 40
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Answer:

In order to detect the operating system on the client machine, your script can analyze the value of navigator.appVersion or navigator.userAgent.

Example: 

// This script sets OSName variable as follows:

// "Windows"    for all versions of Windows

// "MacOS"      for all versions of Macintosh OS

// "Linux"      for all versions of Linux

// "UNIX"       for all other UNIX flavors 

// "Unknown OS" indicates failure to detect the OS



var OSName="Unknown OS";

if (navigator.appVersion.indexOf("Win")!=-1) OSName="Windows";

if (navigator.appVersion.indexOf("Mac")!=-1) OSName="MacOS";

if (navigator.appVersion.indexOf("X11")!=-1) OSName="UNIX";

if (navigator.appVersion.indexOf("Linux")!=-1) OSName="Linux";



document.write('Your OS: '+OSName);


On your system, this script yields the following result: 

Your OS: Windows

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 Responses
Posted by: Bhupentiwari | Posted on: 27 Jun 2012 01:02:26 AM | Points: 10 | Alert Moderator 

This my code but its not giving proper output 

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title>Untitled Page</title>   

    <script type ="text/C#" language ="javascript" >

    

    function x()

      {

        var OSName="Unknown OS";

if (navigator.appVersion.indexOf("Win")!=-1) OSName="Windows";

if (navigator.appVersion.indexOf("Mac")!=-1) OSName="MacOS";

if (navigator.appVersion.indexOf("X11")!=-1) OSName="UNIX";

if (navigator.appVersion.indexOf("Linux")!=-1) OSName="Linux";

document.write('Your OS: '+OSName);      

      }  

    </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

    

        <asp:Button ID="Button1" runat="server" onclientclick="x();" Text="Button" />

    

    </div>

    </form>

</body>

</html>
Posted by: Bhupentiwari | Posted on: 27 Jun 2012 04:17:20 AM | Points: 10 | Alert Moderator 

please reply
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