$(function () {
    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) $('span').text('IE: ' + Sys.ie);
    if (Sys.firefox) $('span').text('Firefox: ' + Sys.firefox);
    if (Sys.chrome) $('span').text('Chrome: ' + Sys.chrome);
    if (Sys.opera) $('span').text('Opera: ' + Sys.opera);
    if (Sys.safari) $('span').text('Safari: ' + Sys.safari);
});