$(document).ready(function(){
  var panel11_currentPosition = 0;
  var panel11_slideWidth = 600;
  var panel11_slides = $('.panel11_slide');
  var panel11_numberOfSlides = panel11_slides.length;

  // Remove scrollbar in JS
  $('#panel11_slideshow').css('overflow', 'hidden');
  $('#panel11_slideshow').css('width', '580px');
  $('.ninesixty .panel .details').css('width', '330px');
  $('.ninesixty .panel #panel11_slideshow').css('width', '580px');

  // Wrap all .slides with #slideInner div
  panel11_slides
  .wrapAll('<div id="panel11_slideInner"></div>')
  // Float left to display horizontally, readjust .slides width
  .css({
    'float' : 'left',
    'width' : panel11_slideWidth
  });

  // Set #slideInner width equal to total width of all slides
  $('#panel11_slideInner').css('width', panel11_slideWidth * panel11_numberOfSlides);

  // Insert left and right arrow controls in the DOM
  $('.ninesixty #panel11 .link')
  	.append('<div id="panel11_slideshow_controls"><span class="panel11_control" id="panel11_previous">Previous</span><span class="panel11_control" id="panel11_next">Next</span></div>');

  // Hide left arrow control on first load
  manageControls(panel11_currentPosition);

  // Create event listeners for .controls clicks
  $('.panel11_control')
    .bind('click', function(){
    // Determine new position
      panel11_currentPosition = ($(this).attr('id')=='panel11_next')
    ? panel11_currentPosition+1 : panel11_currentPosition-1;

      // Hide / show controls
      manageControls(panel11_currentPosition);
      // Move slideInner using margin-left
      $('#panel11_slideInner').animate({
        'marginLeft' : panel11_slideWidth*(-panel11_currentPosition)
      });
    });

  // manageControls: Hides and shows controls depending on currentPosition
  function manageControls(position){
    // Hide left arrow if position is first slide
    if(position==0){ $('#panel11_previous').hide() }
    else{ $('#panel11_previous').show() }
    // Hide right arrow if position is last slide
    if(position==panel11_numberOfSlides-1){ $('#panel11_next').hide() }
    else{ $('#panel11_next').show() }
    }
  });