$(document).ready(function(){
  $('.arrow-next').bind('mouseover', function(){
    $('.arrow-next img').attr('src', '/images/arrow-right-over.jpg');
  });
  $('.arrow-next').bind('mouseout', function(){
    $('.arrow-next img').attr('src', '/images/arrow-right.jpg');
  });
  
  $('.arrow-prev').bind('mouseover', function(){
    $('.arrow-prev img').attr('src', '/images/arrow-left-over.jpg');
  });
  $('.arrow-prev').bind('mouseout', function(){
    $('.arrow-prev img').attr('src', '/images/arrow-left.jpg');
  });
});