PbootCMS 使用IF语句实现导航高亮

<li {pboot:if(0=='{sort:scode}')}class="active"{/pboot:if}><a href='{pboot:sitedomain}/'>首页</a></li>
{pboot:nav}
<li {pboot:if('[nav:scode]'=='{sort:tcode}')}class="active"{/pboot:if}><a href="[nav:link]">[nav:name]</a>
  {pboot:if([nav:soncount]>0)}
  <ul>
	{pboot:2nav parent=[nav:scode]}
	<a href="[2nav:link]">[2nav:name]</a>
	{/pboot:2nav}
  </ul>
  {/pboot:if}
</li>
{/pboot:nav}