webapp/templates/change_star.html

<span id="change-star-{{change.key.id}}">
  {%if change.is_starred%}
    <a href="javascript:M_removeChangeStar({{change.key.id}})">
      <img src="/static/star-lite.gif" width="15" height="15" border="0"></a>
  {%else%}
    {%if request.user%}
      <a href="javascript:M_addChangeStar({{change.key.id}})">
	<img src="/static/star-dark.gif" width="15" height="15" border="0"></a>
    {%endif%}
  {%endif%}
</span>