$(document).ready(function(){
    $(window).resize(function(){
      $('#bg').html('<img src="/feature/home/' + $(document).width() + '/' + $(document).height() + '">')
    });
    
    cached_image1 = new Image();
    cached_image1.src = media_url + 'images/deutsch_a.png';
    cached_image2 = new Image();
    cached_image2.src = media_url + 'images/english_a.png';
    $('#bg').html('<img src="/feature/home/' + $(document).width() + '/' + $(document).height() + '">')
})