function resize() {
  var detail = $('course-detail');
  var picture = $$('#head .picture')[0];
  var pictureHeight = 0;
  if (picture) pictureHeight = picture.getHeight();
  var headHeight = $('head-wrapper').getHeight();
  var detailTop =  $A([
    pictureHeight + 40,
    headHeight + 20
  ]).max();
  detail.style.top = detailTop + 'px';
  var intro = $('intro');
  var introHeight = detailTop + detail.getHeight() - headHeight - 70;
  if (/MSIE [6]/.test(navigator.userAgent) && !window.opera) {
    intro.setStyle('height: ' + introHeight + 'px');
  } else {
    intro.setStyle('min-height: ' + introHeight + 'px');
  }
}
Event.observe(window, 'load', resize);
Event.observe(window, 'resize', resize);