Query 简单实现select二级联动
< !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"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>jQuery 二级联动</title><script src="http://wlog.com.cn/lib/jquery/jquery-1.3.2.js" type="text/javascript"></script><script type="text/javascript"> $(document).ready(function(){ $("#province").change(function(){ $("#province option").each(function(i,o){ if($(this).attr("selected")) { $(".city").hide(); $(".city").eq(i).show(); } }); }); $("#province").change(); });</script></head><body> <select id="province"> <option>----请选择省份---- <option>北京 <option>上海 <option>江苏 </select> <select class="city"> <option>----请选择城市---- </select> <select class="city"> <option>东城</option> <option>西城</option> <option>崇文</option> <option>宣武</option> <option>朝阳</option> </select> <select class="city"> <option>黄浦</option> <option>卢湾</option> <option>徐汇</option> <option>长宁</option> <option>静安</option> </select> <select class="city"> <option>南京</option> <option>镇江</option> <option>苏州</option> <option>南通</option> <option>扬州</option> </select></body>