$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 305;
  var slides = $('.slide-prod');
  var numberOfSlides = slides.length;
  var viewWidth = slideWidth * numberOfSlides;
  var displayed = 3;

  // Remove scrollbar in JS
  $('#slidesContainer-prod').css('overflow', 'hidden');

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

  // Set #slideInner width equal to total width of all slides
  $('#slidesContainer-prod #slideInner-prod').css('width', viewWidth);

  // Insert controls in the DOM
  $('#slideshow-prod')
    .prepend('<span class="control-prod" id="rightControl-prod">Clicking moves left</span>')
    .append('<span class="control-prod" id="leftControl-prod">Clicking moves right</span>');

  // Create event listeners for .controls clicks
  $('.control-prod')
    .bind('click', function(){

    // Determine new position
	currentPosition = ($(this).attr('id')=='leftControl-prod') ? currentPosition+1 : currentPosition-1;

  // If back is clicked on first slide, go to last slide
  if(currentPosition == -1) {
    currentPosition = numberOfSlides-(displayed);
  }
  // If next is clicked on last slide, go to first slide
  else if((numberOfSlides-currentPosition) < displayed) {
    currentPosition = 0;
  }


    $('#slideInner-prod').animate({
      'marginLeft' : slideWidth*(-currentPosition)
    });
  });

  // Hide controls if items less than or equal to displayed
  if(numberOfSlides <= displayed) {
    $('#rightControl-prod,#leftControl-prod').hide();
  }

});