gistfile1.js

/*
var ta = new ToggleAction({
  on: function(obj) {
    setClass(obj, "on");
  }
  off: function(obj) {
    removeClass(obj);
  }
});
*/
var ToggleAction = function() {
  this.initialize.apply(this, arguments);
}
ToggleAction.prototype = {
  initialize: function(args) {
    this.__on = args.on;
    this.__off = args.off;
  },
  on: function(obj) {
    if (this._active) {
      this.off(this._active);
    }
    this.__on(obj);
    this._active = obj;
  },
  off: function(obj) {
    this.__off(obj);
  }
}