value == 'topics') ? 'topic_cloud.html' : 'vocabulary.html')">
            <option selected="selected" disabled="disabled">Overview</option>
            <option>topics</option>
            <option>vocabulary</option>
        </select>
        -
        <select onChange="window.location.href='../topic/'+this.value+'.html'">
            <option selected="selected" disabled="disabled">Details about a topic</option>
            {% for i in topic_ids %}
                <option>{{ i }}</option>
            {% end