window.addEvent('domready', function() {
  $$('img.captioned').each(function(el) {						
    var captionText = ( el.getProperty('title')!=null ) ? el.getProperty('title') : el.getProperty('alt');
    if ( captionText!=null ) {
      var figure = new Element('div', {
        'class' : 'figure',
        'styles' : {
			'float' : el.get('align'),
			'width' : el.get('width').toInt()
        }
      });
      var caption = new Element('p', {
        'class' : 'caption',
        'styles' : {
			'clear' : 'both'
        },
        'html' : captionText
      });
      figure.wraps(el);
      caption.inject(el,'after');
    } else {
      alert('The image: "'+el.getProperty('src')+'" needs a title or alt value.');
    }
  });
});