////////////////////// THE CYCLE OBJECT CLASS //////////////////////
// This is essentially a class which cycles through the div ids passed
// to it on creation
function CycleObject(ids, transType) {

  // Methods
  this.setVisible = function(index) {

     switch(this.transType) {

      case 'normal':
        $(this.ids[this.currentlyVisible]).hide();

        $(this.ids[index]).show();

        this.currentlyVisible = index;
        break;

      case 'fade':
        new Effect.Fade(
          this.ids[this.currentlyVisible],
      		{
      			from: 1.0,
      			to: 0.0,
      			duration: 0.3,
      			queue: 'end'
      		}
      	);

      	new Effect.Appear(
          this.ids[index],
      		{
      			from: 0.0,
      			to: 1.0,
      			duration: 0.3,
      			queue: 'end'
      		}
      	);
        this.currentlyVisible = index;
        break;
    }
  }

  this.nextItem = function() {
    // If we're at the end of the list...
    if( this.currentlyVisible == this.ids.length - 1 ) {
   /*   return false;*/
    } else {
      this.setVisible(this.currentlyVisible + 1);
      return true;
    }
  }


  this.startCycle = function() {
    this.cycleObject = new PeriodicalExecuter(
      this.onUpdateCycle.bind(this), 8 // this is the number of seconds between each interval
    );
  }

  this.onUpdateCycle = function (pe) {
    if (this.nextItem() == false) {
      this.setVisible(0);
    }
  }

  // Properties

  // An array of ids over which the object will cycle
  // First check that the id exists, if not, discard it
  this.ids = [];
  for(i = 0; i < ids.length; i++) {
    if($(ids[i]) != null) {
      this.ids.push(ids[i]);
    }
  }

  // Transition is 'fade' by default
  this.transType = typeof(transType) != 'undefined' ? transType : 'fade';

 
  // The index (of the array ids) of the currently visible div
  this.currentlyVisible = 0;

  // Initialisation
  this.cycleObject = null;

  // find if there are any indicators
  this.indicators = new Array(this.ids.length);

  this.setVisible(0);

}

/////////// END OF CYCLEOBJECT CLASS //////////////////


// script initiates on page load.

this.addEvent = function(obj,type,fn){
	if(obj.attachEvent){
		obj['e'+type+fn] = fn;
		obj[type+fn] = function(){obj['e'+type+fn](window.event );}
		obj.attachEvent('on'+type, obj[type+fn]);
	} else {
		obj.addEventListener(type,fn,false);
	};
};

//addEvent(window,"load",blankwin);