//***************************************
//RPM Ltd 2010 - Written by Jamie Sanders
//***************************************
//Modified from http://sixrevisions.com/tutorials/javascript_tutorial/create-a-slick-and-accessible-slideshow-using-jquery/

(function($) {
    $.fn.slideShow = function(instanceSettings) {
        var currentPosition = 0;
        var slideWidth = 320;
        var slides = $('.instant_win_right');
        var numberOfSlides = slides.length;

        // Remove scrollbar in JS
        $('#slidesContainer').css('overflow', 'hidden');

        // Wrap all .slides with #slideInner div
        slides
            .wrapAll('<div id="slideInner"></div>')
        // Float left to display horizontally, readjust .slides width
            .css({
                'float': 'left',
                'width': slideWidth
            });

        // Set #slideInner width equal to total width of all slides
        $('#slideInner').css('width', slideWidth * numberOfSlides);

        // Insert left and right arrow controls in the DOM
        $('#slideshow')
            .prepend('<span class="control" id="leftControl">Move left</span>')
            .append('<span class="control" id="rightControl">Move right</span>');

        // Hide left arrow control on first load
        manageControls(currentPosition);

        // Create event listeners for .controls clicks
        $('.control')
            .bind('click', function() {
            // Determine new position
            currentPosition = ($(this).attr('id') == 'rightControl')
                ? currentPosition + 1 : currentPosition - 1;

            // Hide / show controls
            manageControls(currentPosition);
            // Move slideInner using margin-left
            $('#slideInner').animate({
                'marginLeft': slideWidth * (-currentPosition)
            });
        });

        // manageControls: Hides and shows controls depending on currentPosition
        function manageControls(position) {
            // Hide left arrow if position is first slide
            if (position == 0) { $('#leftControl').hide() }
            else { $('#leftControl').show() }
            // Hide right arrow if position is last slide
            if (position == numberOfSlides - 1) { $('#rightControl').hide() }
            else { $('#rightControl').show() }
        }
        
    };
})(jQuery);