$(document).ready(function(){
  var currentPosition = 0;
  var slideWidth = 400;
  var slides = $('.deslizaNewsR');
  var numberOfSlides = slides.length;

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

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

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

  // Insert left and right arrow controls in the DOM
  $('#news .localr')
    .prepend('<div class="dosifica-nav"><a style="position: absolute; right: 20px; top: 0;" class="controlNewsR" id="leftControlNewsR" href="javascript:previous();" title="P&aacute;gina anterior">&laquo;</a><a style="position: absolute; right: 0; top: 0;" class="controlNewsR" id="rightControlNewsR" href="javascript:next();" title="P&aacute;gina siguiente">&raquo;</a></div>')
    //.append('<span class="control" id="rightControl">Move right</span>');

  // Hide left arrow control on first load
  manageControls(currentPosition);

  // Create event listeners for .controls clicks
  $('.controlNewsR')
    .bind('click', function(){
    // Determine new position
      currentPosition = ($(this).attr('id')=='rightControlNewsR')
    ? currentPosition+1 : currentPosition-1;

      // Hide / show controls
      manageControls(currentPosition);
      // Move slideInner using margin-left
      $('#slideInnerNewsR').animate({
        'marginLeft' : slideWidth*(-currentPosition)
      }, 750 );
    });

  // manageControls: Hides and shows controls depending on currentPosition
  function manageControls(position){
    // Hide left arrow if position is first slide
    if(position==0){ $('#leftControlNewsR').hide() }
    else{ $('#leftControlNewsR').show() }
    // Hide right arrow if position is last slide
    if(position==numberOfSlides-1){ $('#rightControlNewsR').hide() }
    else{ $('#rightControlNewsR').show() }
    }
  });