js时间日期模块

 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=utf-8" />
 5 <title>无标题文档</title>
 6 <script language="javascript">
 7     //日期，时间
 8     function startTime()
 9     {
10         var today=new Date();
11         var yy=today.getFullYear();//年
12         var mm=today.getMonth();//月
13         var d=today.getDate();//一月中第几天
14         var day=today.getDay();//星期几
15         var h=today.getHours();//小时
16         var m=today.getMinutes();//分钟
17         var s=today.getSeconds();//秒
18         h=checkTime(h);
19         m=checkTime(m);
20         s=checkTime(s);
21         day=checkDay(day);
22         document.getElementById('date').innerHTML=yy+"年"+mm+"月"+d+"日"+"   "+h+":"+m+":"+s+"    "+day;
23         t=setTimeout('startTime()',500);
24     }
25     function checkTime(i)
26     {
27         if(i<10){i="0"+i;}
28         return i;
29     }
30     function checkDay(i)
31     {
32         switch(i)
33         {
34             case 0:
35                 return "星期天";
36                 break;
37             case 1:
38                 return "星期一";
39                 break;
40             case 2:
41                 return "星期二";
42                 break;
43             case 3:
44                 return "星期三";
45                 break;
46             case 4:
47                 return "星期四";
48                 break;
49             case 5:
50                 return "星期五";
51                 break;
52             case 6:
53                 return "星期六";
54                 break;
55             default:
56                 return "时间出错了!";
57                 break;    
58         }
59     }
60 </script>
61 </head>
62 
63 <body onLoad="startTime()">
64 <div id="date"></div>
65 </body>
66 </html>