$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 271;
  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">Влево</span>')
    .append('<span class="control" id="rightControl">Вправо</span>');


  // Create event listeners for .controls clicks
  $('.control')
    .bind('click', function(){
    // Determine new position
    currentPosition = ($(this).attr('id')=='rightControl') ? currentPosition+1 : currentPosition-1;
    if(currentPosition >= numberOfSlides)
    {
       currentPosition = currentPosition-1;
       $('#slideInner').css('marginLeft',-slideWidth*(currentPosition-1));
       var first = $('.slide').eq(0);
       $(first).appendTo('#slideInner');
    }
    if(currentPosition < 0)
    {
       currentPosition = 0;
       $('#slideInner').css('marginLeft',-slideWidth);
       var last = $('.slide').eq(numberOfSlides-1);
       $(last).prependTo('#slideInner');
    }
    
    $('#slideInner').animate({
      'marginLeft' : slideWidth*(-currentPosition)
    });
  });

});