span>
            <span class="op">)</span>
          <span class="op">)</span>
        <span class="op">)</span><span class="op">$</span><span class="va">html</span>
      <span class="op">}</span> <span class="kw">else</span> <span class="op">{</span>
        <span class="co"># Display flow information if cursor is over a flow polygon: what</span>
        <span class="co"># alluvia does it pass through?</span>
        
        <span class="co"># Calculate whether coordinates of hovering cursor are inside 