1 <html>
2 <head>
3 <title>定时刷新时间</title>
4 <script language="JavaScript"> //<script language="JavaScript" src="js.js">
5 function time(){
6 var now =new Date().toLocaleString();
7 alert(now);
8 }
9
10 function start(){
11 timmerID=window.setInterval("time()",1000); //调取函数，调取频率毫秒
12 }
13 function stop(){
14 window.clearInterval(timmerID); //只有遇到clearInterval() 才停止
15 }
16
17 </script>
18 </head>
19 <body>
20 <input type ="button" value="时间" onclick="time()"></button>
21 <input type ="button" value="启动" onclick="start()"></button>
22 <input type ="button" value="停止" onclick="stop()"></button>
23
24
25 </body>
26 </html>
1 <html>
2 <head>
3 <title>时钟、倒计时</title>
4 <script language="JavaScript">
5
6 function rtime(){
7 var djs = document.getElementById("count").innerText;
8 if(djs!=0){
9 document.getElementById("count").innerText=djs-1;
10 setTimeout("rtime()",100); //调取函数，调取频率毫秒 只掉一次
11 }
12 }
13 function time(){
14 var now = new Date();
15 var hour = now.getHours();
16 var min = now.getMinutes();
17 var second = now.getSeconds();
18 var apm = "AM";
19 if(hour>12){
20 hour=hour-12;
21 apm = "PM";
22 }
23 if(hour<10){
24 hour="0"+hour;
25 }
26 if(min<10){
27 min="0"+min;
28 }
29 if(second<10){
30 second="0"+second;
31 }
32 document.form1.myclock.value = hour+":"+min+":"+second+" "+apm ;
33 setTimeout("time()",1000);
34 }
35
36 </script>
37 </head>
38 <body onload="time()">
39 <form name="form1">
40 <input type="text" name="myclock">
41 <div id="count" >111</div>
42 <input type="button" value="倒计时开始" onclick="rtime()">
43 </form>
44
45 </body>
46 </html>
