$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 736;
  var works = $('#featured .work');
  var numberOfSlides = works.length;

  // Wrap all .slides with #slideInner div
  works
  .wrapAll('<div id="slideInner"></div>')
  // Float left to display horizontally, readjust .slides width
  .css({
	'float' : 'left',
	'padding-right' : '15px',
	'width' : slideWidth
  });

  // Set #slideInner width equal to total width of all slides
  $('#slideInner').css('width', (slideWidth + 15) * numberOfSlides);

  // Insert left and right arrow controls in the DOM
  $('#featured')
	.before('<span class="control" id="leftControl">&laquo;</span>')
	.after('<span class="control" id="rightControl">&raquo;</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+15)*(-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() }
	}
  });