CSS3制作时钟

<div class="box">
  <ul>
    <li><span id="hour"></span><span>Hours</span></li>
    <li><span id="minute"></span><span>Minutes</span></li>
    <li><span id="second"></span><span>Seconds</span></li>
  </ul>
</div>

body,ul,li{ 
  padding: 0; 
  margin:0;
}
a {
  color: rgb(1, 124, 185);
  text-decoration: none;
}
body{ 
  font-size:16px; 
  color: #5a5d63;
  background: #d6d7d9; 
  background: -webkit-radial-gradient(#eeefef, #d6d7d9);
  background: -moz-radial-gradient(#eeefef, #d6d7d9);
  background: -o-radial-gradient(#eeefef, #d6d7d9);
  background: -ms-radial-gradient(#eeefef, #d6d7d9);
  background: radial-gradient(#eeefef, #d6d7d9);
  padding: 50px;
}
.box{ 
  width: 540px; 
  height: 200px; 
  margin: 50px auto;
}
.box li{ 
  position: relative; 
  text-align: center; 
  list-style-type: none; 
  display: inline-block; 
  width: 150px; 
  height:160px;
  text-shadow:0 2px 1px #f4f4f4;  
  border:1px solid #9fa2ad; 
  border-radius: 5px; 
  margin-right:10px;
  background: -webkit-gradient(linear,0 0, 0 100%,
    color-stop(.2,rgba(248,248,248,.3)),
    color-stop(.5,rgba(168,173,190,.5)),
    color-stop(.51,rgba(168,173,190,.3)),
    color-stop(.9,rgba(248,248,248,.2))); 
  background: -webkit-linear-gradient(top,rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%, rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);  
  background: -moz-linear-gradient(top, rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%, rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);  
  background: -o-linear-gradient(top,rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%, rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);  
  background: -ms-linear-gradient(top, rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%,rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);  
  background: linear-gradient(top,rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%,rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);  
  box-shadow:inset 0 -2px 0 #f1f1f1,0 1px 0 #f1f1f1,0 2px 0 #9fa2ad,0 3px 0 #f1f1f1,0 4px 0 #9fa2ad;
}
.box li:before,
.box li:after{
  display: block;
  content: ""; 
  position: absolute;
  width: 150px;
}
.box li:before{
  top:50%; 
  height: 1px; 
  box-shadow: 0 1px 0 #868995,0 2px 1px #fff;
}
.box li:after{ 
  bottom: -65px;  
  height: 60px; 
  border-radius:0 0 5px 5px; 
  background: -webkit-gradient(linear,0 0,0 100%,from(rgba(0,0,0,.1)),to(rgba(0,0,0,0))); 
  background: -webkit-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0)); 
  background: -moz-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0)); 
  background: -o-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0)); 
  background: -ms-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0)); 
  background: linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0)); 
  z-index: 1
}
.box li span:first-child{ 
  font:120px ‘BitstreamVeraSansMonoBold‘; 
  color: #52555a; 
  display: block; 
  height: 130px; 
  line-height: 150px; 
}
@font-face {
  font-family: ‘BitstreamVeraSansMonoBold‘;
  src: url(‘VeraMono-Bold-webfont.eot‘);
  src: url(‘VeraMono-Bold-webfont.eot?#iefix‘) format(‘embedded-opentype‘),
       url(‘VeraMono-Bold-webfont.woff‘) format(‘woff‘),
       url(‘VeraMono-Bold-webfont.ttf‘) format(‘truetype‘),
       url(‘VeraMono-Bold-webfont.svg#BitstreamVeraSansMonoBold‘) format(‘svg‘);
  font-weight: normal;
  font-style: normal;
}

var hour=document.getElementById(‘hour‘);
var minute=document.getElementById(‘minute‘);
var second=document.getElementById(‘second‘);
function showTime(){
  var oDate=new Date(); 
  var iHours=oDate.getHours();
  var iMinute=oDate.getMinutes();
  var iSecond=oDate.getSeconds();
  hour.innerHTML=AddZero(iHours);
  minute.innerHTML=AddZero(iMinute);
  second.innerHTML=AddZero(iSecond);
 
}
showTime();
setInterval(showTime,1000);
function AddZero(n){
  if(n<10){
    return ‘0‘+n;
 
  }
 
   return ‘‘+n;
}