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用JS做的时钟

 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" xml:lang="en">
 3 <head>
 4     <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
 5     <title>计时事件表</title>
 6     <script>
 7         function startTime()
 8         {
 9             var today=new Date()
10             var h=today.getHours()
11             var m=today.getMinutes()
12             var s=today.getSeconds()  
13 
14             m = checkTime(m)
15             s = checkTime(s)
16             document.getElementById(‘txt‘).innerHTML=h+":"+m+":"+s
17             t = setTimeout(‘startTime()‘, 500)
18         }
19 
20         function checkTime(i)
21         {
22             //小于10的前面补0
23             if(i<10)
24                 {i="0"+i}
25                 return i
26         }
27     </script>
28 </head>
29 <body onl oad="startTime()">
30     <div id="txt"></div>
31 </body>
32 </html>

 

用JS做的时钟