browser.js

var browser = (function(){
  var s = navigator.userAgent.toLowerCase();
  var m = /(webkit)[ \/]([\w.]+)/.exec(s) ||
    /(opera)(?:.*version)?[ \/]([\w.]+)/.exec(s) ||
    /(msie) ([\w.]+)/.exec(s) ||
    (!(/compatible/.test(s)) && /(mozilla)(?:.*? rv:([\w.]+))?/.exec(s)) ||
    [];
  return {
    userAgent: navigator.userAgent,
    name: m[1] || "",
    version: m[2] || "0"
  }
})();