JavaScript for Chrome extension - get Windows username

I am working on a Chrome extension, where in my JavaScript function should identify the logged in Windows username.

I want to access Windows' username within JavaScript and display it in my Chrome extension web page.

I tried following <script>, this works well i开发者_如何学运维n IE. Is there any equivalent way possible with the Chrome browser?

function GetUserName()
    {
        var wshell = new ActiveXObject("WScript.Shell");
        alert(wshell.ExpandEnvironmentStrings("%USERNAME%"));
    }

Please let me know any built-in method to extract the username.

You're using ActiveX which is only available in IE. In my opinion you should never be able to access information like this from within a browser (and usually can't). I doubt there is a solution which functions like you want.