为什么80%的码农都做不了架构师？>>> 
JavaScript 省市级联效果
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2 <html xmlns="http://www.w3.org/1999/xhtml">
3 <head>
4 <title>省市级联效果</title>
5
6 <script type="text/javascript">
7 function show() {
8 var citys = new Array();
9 citys["湖北省"] = ["襄樊市", "武汉市", "随州市", "荆门市", "黄石市", "恩施市", "咸宁市", "仙桃市", "十堰市", "孝感市", "利川市"];
10 citys["湖南省"] = ["长沙市", "吉首市", "湘潭市", "益阳市", "津市市", "洪江市", "怀化市", "冷水江市", "衡阳市", "郴州市", "永州市", "邵阳市", "岳阳市"];
11 citys["广东省"] = ["广州市", "深圳市", "佛山市", "汕头市", "珠海市", "韶关市", "江门市", "湛江市", "惠州市", "中山市", "东莞市"];
12 citys["北京市"] = ["朝阳区", "丰台区", "崇文区", "宣武区", "海淀区", "顺义区", "平谷区", "怀柔区", "房山区", "东城区", "西城区"];
13
14 document.getElementById("shi").options.length = 1;
15 var sheng = document.getElementById("sheng").value;
16 var newCity;
17 if (sheng != "-=请选择=-") {
18 for (var i = 0; i < citys[sheng].length; i++) {
19 newCity = new Option(citys[sheng][i], citys[sheng][i]);
20 document.getElementById("shi").options.add(newCity);
21 }
22 }
23 }
24
25 </script>
26
27 </head>
28 <body>
29 <div>
30 <select id="sheng" onchange="show()">
31 <option value="-=请选择=-">-=请选择=-</option>
32 <option value="湖北省">湖北省</option>
33 <option value="湖南省">湖南省</option>
34 <option value="广东省">广东省</option>
35 <option value="北京市">北京市</option>
36 </select>
37 <select id="shi">
38 <option>-=请选择=-</option>
39 </select>
40 </div>
41 </body>
42 </html>
