var Carousel = function(carouselElementID, carouselCfg) {
 		this.init(carouselElementID, carouselCfg);
};

Carousel.prototype = {
   init: function(id, cfg) {
      var config = {
			numVisible:        2,
			animationSpeed:    0.50,
			scrollInc:         1,
			navMargin:         0,
			size:              8,
         prevButtonStateHandler: this.handlePrevButtonState,
         nextButtonStateHandler: this.handleNextButtonState
      };

      for (var key in cfg) {
         if (!cfg.hasOwnProperty(key)) { continue; }
         config[key] = cfg[key];
      }

      this.carousel = new YAHOO.extension.Carousel(id, config);

   },

   handlePrevButtonState: function(type, args) {
		var enabling = args[0];
		var leftImage = args[1];
		if(enabling) {
			leftImage.src = "/img/freccia_sx.png";	
		} else {
			leftImage.src = "/img/freccia_sx.png";	
		}
   },

   handleNextButtonState: function(type, args) {
		var enabling = args[0];
		var rightImage = args[1];

		if(enabling) {
			rightImage.src = "/img/freccia_dx.png";
		} else {
			rightImage.src = "/img/freccia_dx.png";
		}
	}
};


/**
 * You must create the carousel after the page is loaded since it is
 * dependent on an HTML element (in this case 'mycarousel'.) See the
 * HTML code below.
 **/
var carousel;

var pageLoad = function() 
{
	carousel = new Carousel("mycarousel", 
		{ prevElement:"prev-arrow", nextElement:"next-arrow", size:10, numVisible:4, scrollInc:3, revealAmount:0 });
		
	//so_init();

};