function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}


function changeMainpageImages() {
  elements = document.getElementById('middle-column_fix').getElementsByTagName('img');
  for (i=0; i<elements.length; i++) {
    elements[i].src = '/images/stories/mp/' + (i+1) + '/' + getRandomInt(1, 4) + '.jpg';
  }
}