javascript计时器的实现

来源：懂视网责编：小采时间：2020-11-27 20:11:58

javascript计时器的实现

javascript计时器的实现:<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>自动增长计时器</title> <script type="text/javascript"> var atime; func

推荐度：

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导读javascript计时器的实现:<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>自动增长计时器</title> <script type="text/javascript"> var atime; func

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>自动增长计时器</title>
<script type="text/javascript">
 var atime;
 function clock(){
 var time=new Date(); 
 atime=time.getHours()+":"+time.getMinutes()+":"+time.getSeconds();
 document.getElementById("clock").value = atime;
 }
 setInterval(clock,1000); 
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" style="background:#000;color:#00ff00;width:55px"; />
</form>
</body>
</html>

效果：

显示当前时间，自动增长

添加按钮的计时器（用于开始和暂停）

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>

<script type="text/javascript">
 var num=0;
 var i;
 function startCount(){
 document.getElementById('count').value=num;
 num=num+1;
 i=setTimeout("startCount()",1000);
 }
 function stopCount(){
 clearTimeout(i);
 }
</script>
</head>
<body>
 <form>
 <input type="text" id="count" />
 <input type="button" value="Start" onclick="startCount()"/>
 <input type="button" value="Stop" onclick="stopCount()" />
 </form>
</body>
</html>

效果：