var Sys = {};

            var ua = navigator.userAgent.toLowerCase();

            var s;

            (s = ua.match(/rv:([\d.]+)\) like gecko/)) ? Sys.ie = s[1] :

                (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :

                    (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :

                        (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :

                            (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :

                                (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;

            if (Sys.ie) {

                isIe = true;

            }