Using JavaScript, this function verifies if the current version of Internet Explorer is the same one as the one passed through the function argument.

// True is being returned if the IE version is the one passed in ieVersion
function IeVersion(ieVersion)
{
        var currUserAgent = navigator.userAgent.toLowerCase();
        if(!(navigator && navigator.userAgent && navigator.userAgent.toLowerCase))
        {
                return false;
        }
        else
        {
                if(currUserAgent.indexOf('msie') + 1)
                {
                        var ver = function()
                        {
                                var rv = -1; // just in case the current browser is not Internet Explorer
                                if (navigator.appName == 'Microsoft Internet Explorer')
                                {
                                        var ua = navigator.userAgent;
                                        var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
                                        if (re.exec(ua) != null)
                                        {
                                                rv = parseFloat( RegExp.$1 );
                                        }
                                }
                                return rv;
                        };
                        var valid = true;
                        if ((ver > -1) && (ver < ieVersion))
                        {
                                valid = false;
                        }
                        return valid;
            }
            else
            {
                        return false;
            }
        }
}