browser_ua.js

var userAgent = navigator.userAgent.toLowerCase();

var browser = {
    version: (userAgent.match(/.+(?:rv|it|ra|ie|me|on)[\/: ]([\d.]+)/) || [])[1],
    chrome: /chrome/.test(userAgent),
    safari: /webkit/.test(userAgent) && !/chrome/.test(userAgent ),
    webkit: /webkit/.test(userAgent),
    opera: /opera/.test(userAgent),
    msie: /msie/.test(userAgent) && !/opera/.test(userAgent ),
    mozilla: /mozilla/.test(userAgent) && !/(compatible|webkit)/.test(userAgent ),
    android: /android/.test(userAgent),
    ios: /iphone/.test(userAgent) || /ipad/.test(userAgent)
};