function parse_webkit_version(version)
{
  var bits = version.split(".");
  var is_nightly = (version[version.length - 1] == "+");
  if (is_nightly) {
    var minor = "+";
  } else {
    var minor = parseInt(bits[1]);
    // If minor is Not a Number (NaN) return an empty string
    if (isNaN(minor)) {
      minor = "";
    }
  }
  return {major: parseInt(bits[0]), minor: minor, is_nightly: is_nightly};
}

function get_webkit_version()
{
  var browser = "";
  
  // Check for Safari
  var regex = new RegExp("Mozilla/5.0 \\(.*\\) AppleWebKit/(.*) \\(KHTML, like Gecko\\) Safari/(.*)");
  var matches = regex.exec(navigator.userAgent);
  if (matches) {
    var browser = "Safari "+matches[2];
    var webkit_version = parse_webkit_version(matches[1]);    
  } 
  
  // Check for Shiira
  var regex = new RegExp("Mozilla/5.0 \\(.*\\) AppleWebKit/(.*) \\(KHTML, like Gecko\\) Shiira/(.*) Safari/(.*)");
  var matches = regex.exec(navigator.userAgent);
  if (matches) {
    var browser = "Shiira "+matches[2];
    var webkit_version = parse_webkit_version(matches[1]);
  } 

  // Check for OmniWeb 4 or 5
  var regex = new RegExp("Mozilla/5.0 \\(.*\\) AppleWebKit/(.*) \\(KHTML, like Gecko\\) OmniWeb/v(.*) ");
  var matches = regex.exec(navigator.userAgent);
  if (matches) {
    var browser = "OmniWeb "+matches[2];
    var webkit_version = parse_webkit_version(matches[1]);
  }

  // Check for OmniWeb 5.1 and up
  var regex = new RegExp("Mozilla/5.0 \\(.*\\) AppleWebKit/(.*) \\(KHTML, like Gecko, Safari\\) OmniWeb/v(.*) ");
  var matches = regex.exec(navigator.userAgent);
  if (matches) {
    var browser = "OmniWeb "+matches[2];
    var webkit_version = parse_webkit_version(matches[1]);
  }

  // Check for NetNewsWire 2 and higher
  var regex = new RegExp("Mozilla/5.0 \\(.*\\) AppleWebKit/(.*) (KHTML, like Gecko) NetNewsWire/(.*)");
  var matches = regex.exec(navigator.userAgent);
  if (matches) {
    var browser = "NetNewsWire "+matches[2];
    var webkit_version = parse_webkit_version(matches[1]);
  }

  // Check for RealPlayer
  var regex = new RegExp("Mozilla/5.0 \\(.*\\) AppleWebKit/(.*) (KHTML, like Gecko) RealPlayer/(.*)");
  var matches = regex.exec(navigator.userAgent);
  if (matches) {
    var browser = "RealPlayer "+matches[2];
    var webkit_version = parse_webkit_version(matches[1]);
  }
  
  // Check for iPhone
  var regex = new RegExp("Mozilla/5.0 \\((.*)\\) AppleWebKit/(.*) \\(KHTML, like Gecko\\) Version/.* Mobile/(.*) Safari/(.*)");
  var matches = regex.exec(navigator.userAgent);
  if (matches) {
    var deviceName = matches[1].split(";")[0];
    var mobileVersion = matches[3];
    var browserVersion = matches[4];
    var browser = deviceName+" "+mobileVersion+" "+browserVersion;
    var webkit_version = parse_webkit_version(matches[2]);
  }
  
  return {major: webkit_version['major'], minor: webkit_version['minor'], is_nightly: webkit_version['is_nightly'], browser: browser};
}