$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 660;
  var slides = $('#slider .scrollContainer > div');
  var numberOfSlides = slides.length;

  // Remove scrollbar in JS
  $('#slider .scroll').css('overflow', 'hidden');

  // Wrap all .slides with #slideInner div
  slides
    .css({
      'float' : 'left',
      'width' : slideWidth
    });

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

  // Create event listeners for .controls clicks
  $('.control')
    .bind('click', function(){
    // Determine new position
    currentPosition = ($(this).attr('id')=='slider-nav-right') ? currentPosition+1 : currentPosition-1;
    
    if (currentPosition < 0) {
        currentPosition = 0;
        return false;
    }
    
    if (currentPosition >= numberOfSlides)
    {
        currentPosition = numberOfSlides-1;
        return false;
    }
    
    // Move slideInner using margin-left
    $('#slider .scrollContainer').animate({
      'marginLeft' : slideWidth*(-currentPosition)
    });
  });
});