Sample def block with mako

template.mako

# Sample def block with mako
<%def name="artist_summary(label, img1, img2, *klass)"
      cached="True" cache_timeout="300">
  <div id="${label}" class="artist-column ${' '.join(klass)}">
    <img src="/static/img/${img1}"/>
  </div>
  <script type="text/javascript">
    $$("#${label} img").invoke('observe', 'mouseover', function(ev) {
      ev.element().setAttribute('src', "/static/img/${img2}");
    });
    $$("#${label} img").invoke('observe', 'mouseout', function(ev) {
      ev.element().setAttribute('src', "/static/img/${img1}");
    });
  </script>
</%def>