span class="hl opt">(</span>parent<span class="hl opt">,</span> <span class="hl kwa">function</span><span class="hl opt">(</span>child<span class="hl opt">) {</span>
        <span class="hl kwa">var</span> nodeType<span class="hl opt">;</span>
        nodeType <span class="hl opt">=</span> child<span class="hl opt">.</span>nodeType<span class="hl opt">;</span>
        <span class="hl kwa">if</span> <span class="hl opt">(</span>nodeType <span class="hl opt">===</span> <span class="hl num">1</span><span class