var WebKitDetect = {};

WebKitDetect.isWebKit = function isWebKit() {
  return RegExp(" AppleWebKit/").test(navigator.userAgent)
};
WebKitDetect.version = function version() {
  var webKitFields = RegExp("( AppleWebKit/)([^ ]+)").exec(navigator.userAgent);
  if (!webKitFields || webKitFields.length<3) { return null } 
  var versionString = webKitFields[2];
  var isNightlyBuild = versionString.indexOf("+") != -1;
  var invalidCharacter = RegExp("[^\\.0-9]").exec(versionString);
  if (invalidCharacter) { 
    versionString = versionString.slice(0,invalidCharacter.index)
  }
  var version = versionString.split(".");
  version.isNightlyBuild = isNightlyBuild;
  return version
};
WebKitDetect.versionIsAtLeast = function versionIsAtLeast(minimumString) { 
  function toIntOrZero(s) { 
    var toInt = parseInt(s);
    return isNaN(toInt) ? 0 : toInt
  }
  if (minimumString === undefined) {
    minimumString = ""
  }
  var minimum = minimumString.split(".");
  var version = WebKitDetect.version();
  if (!version) { return false } 
  if (version.isNightlyBuild) { return true }
  for(var i = 0; i<minimum.length; i++) {
    var versionField = toIntOrZero(version[i]);
    var minimumField = toIntOrZero(minimum[i]);
    if (versionField > minimumField) { return true }
    if (versionField<minimumField) { return false }
  }
  return true
};
WebKitDetect.isMobile = function isMobile() {
  return WebKitDetect.isWebKit() && RegExp(" Mobile/").test(navigator.userAgent)
};
WebKitDetect.mobileDevice = function mobileDevice() {
  if (!WebKitDetect.isMobile()) { return null }
  var fields = RegExp("(Mozilla/5.0 \\()([^;]+)").exec(navigator.userAgent);
  if (!fields||fields.length < 3) { return null }
  return fields[2]
};
WebKitDetect._mobileVersion = function _mobileVersion(versionString) {
  var fields = RegExp("([0-9]+)([A-Z]+)([0-9]+)").exec(versionString);
  if (!fields || fields.length != 4) { return null }
  return [fields[1], fields[2], fields[3]]
};
WebKitDetect.mobileVersion = function mobileVersion() {
  var fields = RegExp("( Mobile/)([^ ]+)").exec(navigator.userAgent);
  if (!fields || fields.length < 3) { return null }
  var versionString = fields[2];
  return WebKitDetect._mobileVersion(versionString)
};
WebKitDetect.mobileVersionIsAtLeast = function mobileVersionIsAtLeast(minimumString) {
  function toIntOrZero(s) {
    var toInt = parseInt(s);
    return isNaN(toInt) ? 0 : toInt
  }
  if (minimumString === undefined) {
    minimumString = ""
  }
  var minimum = WebKitDetect._mobileVersion(minimumString);
  var version = WebKitDetect.mobileVersion();
  if (!version) { return false }
  var majorVersInt = toIntOrZero(version[0]);
  var majorMinInt = toIntOrZero(minimum[0]);
  if (majorVersInt > majorMinInt) { return true }
  if (majorVersInt < majorMinInt) { return false }
  var majorVersAlpha = version[1];
  var majorMinAlpha = minimum[1];
  if (majorVersAlpha > majorMinAlpha) { return true }
  if (majorVersAlpha < majorMinAlpha) { return false }
  var minorVersInt = toIntOrZero(version[2]);
  var minorMinInt = toIntOrZero(minimum[2]);
  if (minorVersInt > minorMinInt) { return true }
  if (minorVersInt < minorMinInt) { return false }
  return true
};

if (WebKitDetect.isWebKit() && WebKitDetect.isMobile()) {
  var answer_is_yes = confirm("iPhone専用ページに移動しますか？");
  if (answer_is_yes) {
    location.href = "http://blog.matake.jp/iphone/#top";
    var indivi = location.href.indexOf("archives", 22);
    if (indivi) {
      location.href = location.href.replace("archives", "iphone") + "#top";
    } else {
      location.href = "http://blog.matake.jp/iphone/#top";
    }
  } else {
    document.write('<style type="text/css"> \
                    #footer .wrapper { padding-bottom: 0; } \
                    #navigation { position: static;  } \
                    </style>');
  }
};