$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 960;
  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">Clicking moves left</span>')
    .append('<span class="control" id="rightControl">Clicking moves 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() }
        }
    });