$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 542;
  var slides = $('.bar');
  var numberOfSlides = slides.length;

  
  $('#slidesContainer').css('overflow', 'hidden');

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

  
  $('#slideInner').css('width', slideWidth * numberOfSlides);

 
  $('#slideshow')
    .prepend('<span class="control" id="leftControl">Clicking moves left</span>')
    .append('<span class="control" id="rightControl">Clicking moves right</span>');

  
  manageControls(currentPosition);

  
  $('.control')
    .bind('click', function(){
    // Determine new position
	currentPosition = ($(this).attr('id')=='rightControl') ? currentPosition+1 : currentPosition-1;
    
	
    manageControls(currentPosition);
    
    $('#slideInner').animate({
      'marginLeft' : slideWidth*(-currentPosition)
    });
  });

  
  function manageControls(position){
    
	if(position==0){ $('#leftControl').hide() } else{ $('#leftControl').show() }
	
    if(position==numberOfSlides-1){ $('#rightControl').hide() } else{ $('#rightControl').show() }
  }	
});