(function(window) {

  var document = window.document;

  Helpden = {



    init: function(options) {

      Helpden.createTab();

      Helpden.update(options);

    },



    update: function(settings) {

      var self = Helpden;

      self._configure(settings);

      if (!self._settings.url) {

        console && console.warn && console.warn("Helpden Dropbox must be configured with a URL.");

      } else {

        self._updateTab();

      }

    },



    _settings: {

      dropboxID:      null, 

      tabID:          "support",

      tabText:        "Live Support", 

      tabColor:       "#000000",

      tabPosition:    'Left'

    },



    _configure: function(options) {

      var prop;

      var self = this;

      for (prop in options) {

        if (options.hasOwnProperty(prop)) {

          self._settings[prop] = options[prop];

        }

      }

      self._prependSchemeIfNecessary('url');

    },



    _prependSchemeIfNecessary: function(urlProperty) {

      var url = this._settings[urlProperty];

      if (url && !(this._checkUrl.test(url))) {

        this._settings[urlProperty] = document.location.protocol + "//" + url;

      }

    },



    _checkUrl: /^[a-zA-Z]+:\/\//,



    _updateTab: function() {

        var tab = document.getElementById('Helpden_tab');

        tab.setAttribute('title', this._settings.tabText);

        tab.setAttribute('class', 'HelpdenTab' + this._settings.tabPosition.toLowerCase());

        tab.setAttribute('className', 'HelpdenTab' + this._settings.tabPosition.toLowerCase()); 

        var post_url = this._settings.url + "?id="+this._settings.dropboxID+"&position="+this._settings.tabPosition.toLowerCase();

		tab.innerHTML = '<iframe src="'+post_url+'" frameborder="0" scrolling="auto" allowTransparency="true" style="border:0;"></iframe>';

		//tab.style.backgroundColor = this._settings.tabColor;

        //tab.style.borderColor = this._settings.tabColor;

        tab.style.display = 'block';

    },



    createTab: function() {

      var tab = document.createElement('a');

      tab.setAttribute('id', 'Helpden_tab');

      tab.setAttribute('href', '#');

      tab.style.display = 'none';

      document.body.appendChild(tab);

    }

  

  };



  if (window.Helpden_params) {

    Helpden.init(window.Helpden_params);

  }



})(this.window || this);