function popupArticleImage(id) {
  window.open("/articles/image_popup/" + id, "image_popup", "height=500,width=400,menubar=no,toolbar=no,titlebar=no");
}

function fitToContent() {
  if ($('article_image')) {
    el_w = $('article_image').width;
    el_h = $('article_image').height;
  } else {
    el_w = $('error_container').offsetWidth;
    el_h = $('error_container').offsetHeight;
  }

  el_w += 50;
  el_h += 65;

  el_w = (el_w < 100) ? 100 : el_w;
  el_h = (el_h < 100) ? 100 : el_h;

  window.resizeTo(el_w, el_h);
}