jquery_14_useragent_test.js

function jquery_14_useragent_test( ua ) {
  var ret = { browser: "" };

  ua = ua.toLowerCase();

  if ( /webkit/.test( ua ) ) {
    ret = { browser: "webkit", version: /webkit[\/ ]([\w.]+)/ };

  } else if ( /opera/.test( ua ) ) {
    ret = { browser: "opera", version:  /version/.test( ua ) ? /version[\/ ]([\w.]+)/ : /opera[\/ ]([\w.]+)/ };
    
  } else if ( /msie/.test( ua ) ) {
    ret = { browser: "msie", version: /msie ([\w.]+)/ };

  } else if ( /mozilla/.test( ua ) && !/compatible/.test( ua ) ) {
    ret = { browser: "mozilla", version: /rv:([\w.]+)/ };
  }

  ret.version = (ret.version && ret.version.exec( ua ) || [0, "0"])[1];

  return ret;
}

function my_useragent_test( ua ) {
  var matches;

  ua = ua.toLowerCase();

  if ( matches = /(webkit)[ \/]([\w.]+)/.exec( ua ) ) {
    
  } else if ( matches = /(opera)(?:.*version)?[ \/]([\w.]+)/.exec( ua ) ) {
    
  } else if ( matches = /(msie) ([\w.]+)/.exec( ua ) ) {
    
  } else if ( !/compatible/.test( ua ) && ( matches = /(mozilla)(?:.*? rv:([\w.]+))?/.exec( ua ) ) ) {
    
  } else {
    matches = [];
  }

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