Redmine/app/views/repositories/_revision_graph.html.erb

<%= javascript_include_tag "raphael.js" %>
<script type="text/javascript" charset="utf-8">
  var chunk = {commits:<%= commits.values.to_json.html_safe %>}
</script>
<%= javascript_include_tag "revision_graph.js" %>

<script type="text/javascript">
  Event.observe(window,"load", function(){
    branchGraph(document.getElementById("holder"));
  })
</script>

<div id="holder" class="graph"></div>