HTML--JS 定时刷新、时钟、倒计时 

 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>


 


 




 






            

            
posted @ 
2017-12-04 22:09 
Mr·Liu 
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