1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>二级联动</title> 6 <script src="http://apps.bdimg.com/libs/jquery/1.8.1/jquery.min.js" type="text/javascript"></script> 7 <script type="text/javascript"> 8 $(document).ready(function(){ 9 $("#province").change(function(){ 10 $("#province option").each(function(i,o){ 11 if($(this).attr("selected")) 12 { 13 $(".city").hide(); 14 $(".city").eq(i).show(); 15 } 16 }); 17 }); 18 $("#province").change(); 19 }); 20 </script> 21 </head> 22 <body> 23 <select id="province"> 24 <option>----请选择省份----</option> 25 <option>北京</option> 26 <option>上海</option> 27 <option>江苏</option> 28 </select> 29 <select class="city"> 30 <option>----请选择城市----</option> 31 </select> 32 <select class="city"> 33 <option>东城</option> 34 <option>西城</option> 35 <option>崇文</option> 36 <option>宣武</option> 37 <option>朝阳</option> 38 </select> 39 <select class="city"> 40 <option>黄浦</option> 41 <option>卢湾</option> 42 <option>徐汇</option> 43 <option>长宁</option> 44 <option>静安</option> 45 </select> 46 <select class="city"> 47 <option>南京</option> 48 <option>镇江</option> 49 <option>苏州</option> 50 <option>南通</option> 51 <option>扬州</option> 52 </select> 53 </body> 54 </html>