<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
<title></title>
<style>
*{
margin: 0px;
padding: 0px;
}
.clock{
200px;
height: 200px;
border: 1px solid #000;
border-radius: 50%;
position: relative;
margin: 20px;
background-size: 100%;
}
.clock .hour{
10px;
height: 70px;
background: orange;
position: absolute;
left: 95px;
top: 30px;
/*animation: sec 86400s infinite;*/
}
.clock .minute{
6px;
height: 80px;
background: deepskyblue;
position: absolute;
left: 97px;
top: 20px;
/*animation: sec 3600s infinite;*/
}
.clock .second{
2px;
height: 90px;
background: red;
position: absolute;
left: 99px;
top: 10px;
/*animation: sec 60s infinite;*/
}
@keyframes sec{
0%{transform-origin: center bottom;transform: rotate(0deg);}
100%{transform-origin: center bottom;transform: rotate(360deg);}
}
</style>
</head>
<body>
<div class="clock">
<div class="hour"></div>
<div class="minute"></div>
<div class="second"></div>
</div>
</body>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<!--这里调用jquery是为了选取元素方便而已，初学建议用dom选取元素-->
<script>
function fn(){
var myDate=new Date;
var h=myDate.getHours();
var m=myDate.getMinutes();
var s=myDate.getSeconds();
$(".clock .hour").css({"transform-origin":" center bottom","transform":"rotate("+30*h+"deg)"});
$(".clock .minute").css({"transform-origin":" center bottom","transform":"rotate("+6*m+"deg)"});
$(".clock .second").css({"transform-origin":" center bottom","transform":"rotate("+6*s+"deg)"});
}
fn();
setInterval(fn,1000);
</script>
</html>