// JavaScript Document
var handleNextButtonState = function(type, args) {

    var enabling = args[0];
    var rightImage = args[1];
    
    if(enabling) {
         upImage.src = "images/flech_bottom_dis.jpg";
    } else {
      	 upImage.src = "images/flech_bottom.jpg";
    }
    
};

var handlePrevButtonState = function(type, args) {

    var enabling = args[0];
    var upImage = args[1];


	    if(enabling) {
        upImage.src = "images/flech_top.jpg";
    } else {
        upImage.src = "images/flech_top_dis.jpg";
    }
    
};

var pageLoad = function() 
{
    var carousel = new YAHOO.extension.Carousel("dhtml-carousel", 
        {
            numVisible     :3,
            animationSpeed :2,
            scrollInc	   :2,
			size		   :$nb_photos,
			wrap           :true,
            orientation    :"vertical",
            navMargin      :0,
            prevElement    :"prev-arrow", 
            nextElement    :"next-arrow",
			prevButtonStateHandler: handlePrevButtonState,
			nextButtonStateHandler: handleNextButtonState
        }
    );
};

YAHOO.util.Event.addListener(window, 'load', pageLoad);