var BrowserHandler = {

    userAgent : '',

    init : function()
    {
        BrowserHandler.userAgent = window.navigator.userAgent;
        BrowserHandler.handleIE();
    },

    handleIE : function()
    {
        // Detect versions below ie11
        var msie = BrowserHandler.userAgent.indexOf("MSIE ");
        var ielt11 = msie > 0;

        // Detect ie11
        var ie11 = !!navigator.userAgent.match(/Trident.*rv\:11\./);

        // If Internet Explorer
        if (ielt11 || ie11)
        {
            // Default version
            var version = '11';

            // Way to detect version < 11
            if(ielt11) version = parseInt(BrowserHandler.userAgent.substring(
                msie+5,
                BrowserHandler.userAgent.indexOf(".", msie )
                ));

            // Append classes to HTML
            $('html').addClass('ie v' + version);
        }
    }
};

BrowserHandler.init();