dedecms做下拉菜单：
将下面这段代码贴到templets\default\footer.htm文件里
<!--//二级子类下拉菜单，考虑SEO原因放置于底部--><scripttype='text/javascript'src='{dede:global.cfg_cmsurl/}/images/js/dropdown.js'></script>{dede:channelartlisttypeid='top'cacheid='channelsonlist'}<ulid="dropmenu{dede:field.typeid/}"class="dropMenu">{dede:channeltype='son'noself='yes'}<li><ahref="[field:typelink/]">[field:typename/]</a></li>{/dede:channel}</ul>{/dede:channelartlist}<scripttype="text/javascript">cssdropdown.startchrome("navMenu")</script>