$(document).ready(function(){
var currentPosition = 0;
var slideWidth = 726;
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() }
}
});