$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 520;
  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">Clicking moves left</span>')
    .append('<span class="control" id="rightControl">Clicking moves right</span>');
  
  // Hide left arrow control on first load
  manageControls(currentPosition);
  
  // Create event listeners for .controls clicks
  $('.control').bind('click', function() {
    if (!updatesAutoclick) updatesStopped = true;
    // Determine new position
    currentPosition = ($(this).attr('id')=='rightControl') ? currentPosition+1 : currentPosition-1;
    
    // Hide / show controls
    manageControls(currentPosition);
    // Move slideInner using margin-left
    $('#slideInner').animate({
      'marginLeft' : slideWidth*(-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() }
  }
});

// automatically scroll the updates every 10 seconds
var updatesAutoclick = false;
var moveLeft = true;
$(document).everyTime(10000, function(i) {
  if (moveLeft && $('#rightControl').is(':visible')) {
    updatesAutoclick = true;
    $('#rightControl').click();
    if (!$('#rightControl').is(':visible')) moveLeft = false;
    updatesAutoclick = false;
  }
  else if (!moveLeft) {
    updatesAutoclick = true;
    $('#leftControl').click();
    if (!$('#leftControl').is(':visible')) moveLeft = true;
    updatesAutoclick = false;
  }
});