(function ($) {
$(window).ready(function() {
  var bgArray = ['book-900x200.jpg', 'parchment-900x200.jpg', 'hands-900x200.jpg','coins-900x200.jpg','tablet-900x200.jpg'];
  var bg = bgArray[Math.floor(Math.random() * bgArray.length)];
  var path = '/sites/default/files/images/';
  var imageUrl = path + bg;
  $('.region.region-content').css({
   'background-image' : 'url(' + imageUrl +')',
   'background-repeat ' : 'no-repeat',
   'background-position-y' : '0'
});
$( ".region.region-content").prepend( '<span class="sr-only sr-only-focusable">Image: Photo of classical Greek script</span>' );
});
})(jQuery);