$(document).ready(function(){
  var panel9_currentPosition = 0;
  var panel9_slideWidth = 600;
  var panel9_slides = $('.panel9_slide');
  var panel9_numberOfSlides = panel9_slides.length;

  // Remove scrollbar in JS
  $('#panel9_slideshow').css('overflow', 'hidden');
  $('#panel9_slideshow').css('width', '580px');
  $('.ninesixty .panel .details').css('width', '330px');
  $('.ninesixty .panel #panel9_slideshow').css('width', '580px');

  // Wrap all .slides with #slideInner div
  panel9_slides
  .wrapAll('<div id="panel9_slideInner"></div>')
  // Float left to display horizontally, readjust .slides width
  .css({
    'float' : 'left',
    'width' : panel9_slideWidth
  });

  // Set #slideInner width equal to total width of all slides
  $('#panel9_slideInner').css('width', panel9_slideWidth * panel9_numberOfSlides);

  // Insert left and right arrow controls in the DOM
  $('.ninesixty #panel9 .link')
  	.append('<div id="panel9_slideshow_controls"><span class="panel9_control" id="panel9_previous">Previous</span><span class="panel9_control" id="panel9_next">Next</span></div>');

  // Hide left arrow control on first load
  manageControls(panel9_currentPosition);

  // Create event listeners for .controls clicks
  $('.panel9_control')
    .bind('click', function(){
    // Determine new position
      panel9_currentPosition = ($(this).attr('id')=='panel9_next')
    ? panel9_currentPosition+1 : panel9_currentPosition-1;

      // Hide / show controls
      manageControls(panel9_currentPosition);
      // Move slideInner using margin-left
      $('#panel9_slideInner').animate({
        'marginLeft' : panel9_slideWidth*(-panel9_currentPosition)
      });
    });

  // manageControls: Hides and shows controls depending on currentPosition
  function manageControls(position){
    // Hide left arrow if position is first slide
    if(position==0){ $('#panel9_previous').hide() }
    else{ $('#panel9_previous').show() }
    // Hide right arrow if position is last slide
    if(position==panel9_numberOfSlides-1){ $('#panel9_next').hide() }
    else{ $('#panel9_next').show() }
    }
  });