/**
 *  Carousel Image src URLs
 **/
var imageList = [
                 ];


var loadInitialItems = function(type, args) {

    var start = args[0];
    var last = args[1]; 

    load(this, start, last);    
    var status = "Showing " + start + " of " + this.getProperty("size");
    YAHOO.util.Dom.get("indicator").innerHTML = status;
};

var animComplete = function(type, args) {
    var direction = args[0]; // string either: 'next' or 'prev'

    var status = "Showing " + this.getFirstVisible() + " of " + this.getProperty("size");
    YAHOO.util.Dom.get("indicator").innerHTML = status + " (done)";

};


var loadNextItems = function(type, args) {    

    var start = args[0];
    var last = args[1]; 
    var alreadyCached = args[2];

    if(!alreadyCached) {
        load(this, start, last);
    }
};


var loadPrevItems = function(type, args) {
    var start = args[0];
    var last = args[1]; 
    var alreadyCached = args[2];

    if(!alreadyCached) {
        load(this, start, last);
    }
}; 

var load = function(carousel, start, last) {
    for(var i=start; i<= last+1; i++) {
        carousel.addItem(i, fmtItem(imageList[i-1]));
    }
}


var handlePrevButtonState = function(type, args) {

    var enabling = args[0];
    var leftImage = args[1];
    if(enabling) {
        leftImage.src = "../images/carousel/left-enabled.png";
    } else {
        leftImage.src = "../images/carousel/left-disabled.png";
    }

};


var handleNextButtonState = function(type, args) {

    var enabling = args[0];
    var rightImage = args[1];
    if(enabling) {
        rightImage.src = "../images/carousel/right-enabled.png";
    } else {
        rightImage.src = "../images/carousel/right-disabled.png";
    }

};


var carousel; // for ease of debugging; globals generally not a good idea

var pageLoad = function() 
{
    carousel = new YAHOO.extension.Carousel("dhtml-carousel", 
        {
            numVisible:        1,
            animationSpeed:   0.35,
            scrollInc:         1,
			wrap: true,
            //animationMethod:   YAHOO.util.Easing.backOut,
            navMargin:         40,
            size:              12,
            prevElement:     "left-arrow",
            nextElement:     "right-arrow",
            loadInitHandler:   loadInitialItems,
            loadNextHandler:   loadNextItems,
            loadPrevHandler:   loadPrevItems,
            animationCompleteHandler: animComplete,
            prevButtonStateHandler:   handlePrevButtonState,
            nextButtonStateHandler:   handleNextButtonState
        }
    );

};




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