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 <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
5 <title>小灰</title>
6 </head>
7 <body>
8 <form name="form1" method="post">
9 <select id="s1" name="s1"></select><select id="s2" name="s2"></select><select id="s3" name="s3"></select><select id="s4" name="s4"></select>
10 </form>
11 <script language="JavaScript">
12 <!--
13 function LianDong(arr, sel)
14 {
15 var me = this;
16 this.$ = function(o)
17 {
18 return document.getElementByIdx(o);
19 }
20 this.sub = function (i, pid)
21 {
22 for (var j=i+1; j<sel.length; j++)
23 {
24 me.$(sel[j]).length = 0;
25 me.$(sel[j]).options[0] = new Option("请选择", "");
26 }
27 for ( var j = 0; j < arr.length; j++)
28 {
29 if (arr[j][1] == pid)
30 {
31 me.$(sel[i+1]).options[me.$(sel[i+1]).length] = new Option(arr[j][2], arr[j][0]);
32 }
33 }
34 }
35 this.init = function()
36 {
37 me.sub(-1,"root");
38 for (var i=0; i<sel.length-1; i++)
39 {
40 me.$(sel[i]).onchange = function()
41 {
42 var i;
43 for (i=0; me.$(sel[i])!=this; i++);
44 me.sub(i, me.$(sel[i]).value);
45 }
46 }
47 }
48 this.init();
49 }
50 var array=new Array();
51 array[0]=new Array("华南地区","root","华南地区");
52 array[1]=new Array("华北地区","root","华北地区");
53 array[2]=new Array("上海","华南地区","上海");
54 array[3]=new Array("广东","华南地区","广东");
55 array[4]=new Array("徐家汇","上海","徐家汇");
56 array[5]=new Array("普托","上海","普托");
57 array[6]=new Array("广州","广东","广州");
58 array[7]=new Array("湛江","广东","湛江");
59 array[8]=new Array("湛江1","湛江","湛江1");
60 array[9]=new Array("湛江2","湛江","湛江2");
61 array[10]=new Array("广州1","广州","广州1");
62 array[11]=new Array("广州2","广州","广州2");
63 var select = new Array("s1","s2","s3","s4");
64 var liandong=new LianDong(array, select)
65 //-->
66 </script>
67 </body>
68 </html>
