$(document).ready(
    function() {
        var browserInfo = {
            screenWidth      : screen.width,
            screenHeight     : screen.height,
            screenColorDepth : screen.colorDepth,
            platform         : navigator.platform,
            appName          : navigator.appName,
            appCodeName      : navigator.appCodeName,
            appMinorVersion  : navigator.appMinorVersion,
            appVersion       : navigator.appVersion,
            userProfile      : navigator.userProfile,
            userAgent        : navigator.userAgent,
            language         : navigator.language,
            cpuClass         : navigator.cpuClass,
            // mimeTypes        : navigator.mimeTypes,
            // plugins          : navigator.plugins,
            onLine           : navigator.onLine,
            systemLanguage   : navigator.systemLanguage,
            userLanguage     : navigator.userLanguage,
            cookieEnabled    : navigator.cookieEnabled,
            javaEnabled      : navigator.javaEnabled(),
            taintEnabled     : navigator.taintEnabled(),
            nospam           : 4
        };
        $('input[name=browser_info]').val($.toJSON(browserInfo));
    }
);