一个最简单的级联下拉菜单

<！DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="gb2312"> <head> <head> <title> 代码实例:级联菜单 </title> <meta http-equiv="content-type" content="text/html; charset=gb2312" /> <meta name="author" content="枫岩,CNLei.y.l@gmail.com"> </head> <body> <select id="BigCate" name="BigCate" size="1" onchange="Redirect（this.options.selectedIndex）"> <option value="">人物</option> <option value="">地理</option> <option value="">野生动物</option> <option value="">科技</option> <option value="">静物</option> <option value="">设计</option> <option value="">新闻</option> <option value="">宠物</option> <option value="">植物</option> <option value="">娱乐</option> <option value="">生活亮点</option> <option value="">体育</option> </select> <select id="SmlCate" name="SmlCate" size="1"> <option value="1">日常生活</option> <option value="2">旅行</option> <option value="3">聚会</option> <option value="4">婚庆</option> <option value="5">节日</option> <option value="6">美女写真</option> <option value="7">人体摄影</option> <option value="8">网友自拍</option> <option value="9">演艺明星</option> <option value="10">体育明星</option> <option value="11">政坛名人</option> <option value="12">其它</option> </select> <script type="text/javascript"></script> </body> </html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]