内页banner图从后台调用分类图片
<div style="background:url({%$rootdir%}{%find:type class=$type.topid out=typepic%}{%$type.typepic%}) 50% 0 no-repeat;"></div>
{%find:type class=$type.topid out=typepic%}{%$type.typepic%}
原文：http://www.cnblogs.com/woodk/p/4768690.html