function createDiv()
{  
  div_covers = document.getElementById('main_covers');
 
  old_div = document.getElementById('old');
  old_div.style.opacity = 0;
  
  var new_div = document.createElement('div');
  new_div.id = 'new';
  new_div.className = 'covers';
  new_div.style.opacity = 1;
  
  var img = document.createElement('img');
  
  img.src = 'images/1095325009_czaplinek.jpg';
  img.className = 'new_row';
  new_div.appendChild(img);

  var img = document.createElement('img');  
  img.src = 'images/1095325009_czaplinek.jpg';
  new_div.appendChild(img);

  var img = document.createElement('img');
  img.src = 'images/1095325009_czaplinek.jpg';
  new_div.appendChild(img);

  var img = document.createElement('img');
  img.src = 'images/1095325009_czaplinek.jpg';
  img.className = 'new_row';
  new_div.appendChild(img);

  div_covers.appendChild(new_div);
  
  return false;
}