function init_gallery () {
  var el = document.getElementById ('venue_gallery');
  
  if (el) {
    
    var i;
    var image_container;
    
    for (i = 0; i < el.childNodes.length; i++) {
      image_container = el.childNodes.item (i);
      if (image_container.className && image_container.className == 'venue_thumb') {
        
        init_thumb (image_container);
        
      }
    }
    
  }
}

function init_thumb (image_container) {
  image_container.onclick = function () {
    var img = document.getElementById ('venue_image');
    var caption = document.getElementById ('venue_caption');
    if (img && caption) {
      img.src = String (image_container.firstChild.src).replace (/\.small/, '');
      caption.innerHTML = image_container.firstChild.title;
    }
  }
  image_container.firstChild.className = 'clickable';
}