http://www.activa.com.au/js/browser.js

1// JavaScript Document
2var matched, browser;
3
4jQuery.uaMatch = function( ua ) {
5    ua = ua.toLowerCase();
6
7    var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
8        /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
9        /(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
10        /(msie) ([\w.]+)/.exec( ua ) ||
11        ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
12        [];
13
14    return {
15        browser: match[ 1 ] || "",
16        version: match[ 2 ] || "0"
17    };
18};
19
20matched = jQuery.uaMatch( navigator.userAgent );
21browser = {};
22
23if ( matched.browser ) {
24    browser[ matched.browser ] = true;
25    browser.version = matched.version;
26}
27
28// Chrome is Webkit, but Webkit is also Safari.
29if ( browser.chrome ) {
30    browser.webkit = true;
31} else if ( browser.webkit ) {
32    browser.safari = true;
33}
34
35jQuery.browser = browser;