1 <html xmlns="http://www.w3.org/1999/xhtml">
2 <head>
3 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
4 <title>无标题文档</title>
5 <select id="nian" onclick="biantian()"></select>年
6 <select id="yue" onclick="biantian()"></select>月
7 <select id="tian"></select>日
8
9 <script type="text/javascript">
10 FillNian();
11 FillYue();
12 FillTian();
13 function FillNian()
14 {
15 var b = new Date();
16 var nian = parseInt(b.getFullYear());
17
18 var str = "";
19
20 for(var i=nian-5;i<nian+6;i++)
21 {
22 str = str+"<option value='"+i+"'>"+i+"</option>";
23 }
24
25 document.getElementById("nian").innerHTML = str;
26
27 }
28
29 //月数
30 function FillYue()
31 {
32 var str = "";
33 for(var i=1;i<13;i++)
34 {
35 str = str+"<option value='"+i+"'>"+i+"</option>";
36 }
37 document.getElementById("yue").innerHTML = str;
38 }
39
40 //每月天数的变化
41 function FillTian()
42 {
43 var yue = document.getElementById("yue").value;
44 var nian = document.getElementById("nian").value;
45 var ts = 31;
46
47 //30号的月数
48 if(yue==4 || yue==6 || yue==9 || yue==11)
49 {
50 ts=30;
51 }
52
53 //2月不同年的天
54 if(yue==2)
55 {
56 if((nian%4==0 && nian%100 != 0) || nian%400==0)
57 {
58 ts = 29;
59 }
60 else
61 {
62 ts = 28;
63 }
64 }
65
66 var str = "";
67 for(var i=1;i<ts+1;i++)
68 {
69 str = str+"<option value='"+i+"'>"+i+"</option>";
70 }
71 document.getElementById("tian").innerHTML = str;
72 }
73
74
75 function biantian()
76 {
77 FillTian();
78 }
79 </script>
80
81 </body>
82 </html>
