jQuery browser sniffer (user agent)

jQuery.uaMatch = function( ua ) {
  ua = ua.toLowerCase();

  var match = /(chrome)[ \/]([\w.]+)/.exec( ua ) ||
    /(webkit)[ \/]([\w.]+)/.exec( ua ) ||
    /(opera)(?:.*version|)[ \/]([\w.]+)/.exec( ua ) ||
    /(msie) ([\w.]+)/.exec( ua ) ||
    ua.indexOf("compatible") < 0 && /(mozilla)(?:.*? rv:([\w.]+)|)/.exec( ua ) ||
    [];

  return {
    browser: match[ 1 ] || "",
    version: match[ 2 ] || "0"
  };
};

matched = jQuery.uaMatch( navigator.userAgent );
browser = {};

if ( matched.browser ) {
  browser[ matched.browser ] = true;
  browser.version = matched.version;
}

// Chrome is Webkit, but Webkit is also Safari.
if ( browser.chrome ) {
  browser.webkit = true;
} else if ( browser.webkit ) {
  browser.safari = true;
}

jQuery.browser = browser;