var handlePrevButtonState = function(type, args) {

    var enabling = args[0];
    var leftImage = args[1];
    if(enabling) {
        leftImage.src = "/images2/mleftbutton1.png";    
    } else {
        leftImage.src = "/images2/mleftbutton2.png";    
    }
    
};


var handleNextButtonState = function(type, args) {

    var enabling = args[0];
    var rightImage = args[1];
    
    if(enabling) {
        rightImage.src = "/images2/mrightbutton1.png";
    } else {
        rightImage.src = "/images2/mrightbutton2.png";
    }
    
};


var carousel; // for ease of debugging; globals generally not a good idea
var pageLoad = function() 
{
    carousel = new YAHOO.extension.Carousel("trailers", 
        {
            numVisible:        4,
            animationSpeed:    0.25,
            scrollInc:         3,
            navMargin:         30,
            prevElement:     "prev-arrow",
            nextElement:     "next-arrow",
            size:              8,
            prevButtonStateHandler:   handlePrevButtonState,
            nextButtonStateHandler:   handleNextButtonState
        }
    );

};

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