$(document).ready(function(){
    var currentPosition = 0;
    var slideWidth = 506;
    var slides = $('.slide');
    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 controls in the DOM
    $('#slideshow')
    .prepend('<span class="control" id="leftControl">Left</span>')
    .append('<span class="control" id="rightControl">Right</span>');

    // Create event listeners for .controls clicks
    $('.control')
    .bind('click', function(){
        // Determine new position
        switch (currentPosition) {
            case 0:
                currentPosition = ($(this).attr('id')=='rightControl') ? currentPosition+1 : numberOfSlides-1;
                break;
            case numberOfSlides-1:
                currentPosition = ($(this).attr('id')=='rightControl') ? 0 : currentPosition-1;
                break;
            default:
                currentPosition = ($(this).attr('id')=='rightControl') ? currentPosition+1 : currentPosition-1;
        }

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