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一直想学CSS3，今天别的论坛看到的例子，挺好，mark起来以后自己看。
<!doctype html> <html> <head> <meta charset=‘utf-8‘> <title>title</title> <style> *{margin:0;padding:0} #box{ width:300px; height:300px; border:1px solid #000; border-radius:50%; position:absolute; top:100px;left:300px; box-shadow:1px 1px 5px #000; cursor:pointer; } .hour{ width:14px; height:80px; background:#000; position:absolute; top:50%;left:50%; margin:-80px 0 0 -7px; transform-origin:center bottom; } .min{ width:14px; height:100px; background:#000; position:absolute; top:50%;left:50%; margin:-100px 0px 0px -7px; border-radius:50% 50% 0 0; transform-origin:center bottom; } .sec{ width:4px; height:120px; background:red; position:absolute; top:50%;left:50%; margin:-120px 0 0 -2px; transform-origin:center bottom; } .cap{ width:20px; height:20px; background:#999; border-radius:50%; position:absolute; top:50%;left:50%; margin:-10px 0 0 -10px; } .scale{ width:4px; height:10px; background:#000; position:absolute; left:50%; margin-left:-2px; display:block; -webkit-transform:rotate(45deg); transform-origin:center 150px; } .bs{ width:6px;height:18px; background:#000; position:absolute; left:50%; margin-left:-3px; display:block; -webkit-transform:rotate(45deg); transform-origin:center 150px; } .bs em{ width:50px; text-align:center; margin:17px 0; position:absolute; top:0px;left:50%; margin-left:-25px; font-style:normal } </style> <script type="text/javascript"> window.onload = function(){ var oBox = document.getElementById(‘box‘); var oH = document.querySelector(‘.hour‘); var oM = document.querySelector(‘.min‘); var oS = document.querySelector(‘.sec‘); var N = 60; for(var i=0;i<N;i++){ var oSpan = document.createElement(‘span‘); if(i%5==0){ oSpan.className = ‘bs‘; var num = i/5==0 ? 12:i/5; oSpan.innerHTML = ‘<em>‘+num+‘</em>‘; oSpan.style.transform = ‘rotate(‘+(i*N)+‘deg)‘; oSpan.children[0].style.transform = ‘rotate(‘+ -i*6 +‘deg)‘; }else{ oSpan.className = ‘scale‘; } oBox.appendChild(oSpan); oSpan.style.transform = ‘rotate(‘+6*i+‘deg)‘; } function clock(){ var oDate = new Date(); var h = oDate.getHours(); var m = oDate.getMinutes()+1; var s = oDate.getSeconds(); var ms= oDate.getMilliseconds(); oH.style.transform = ‘rotate(‘+(h*30+m/60*30)+‘deg)‘; oM.style.transform = ‘rotate(‘+(m*6+s/60*6)+‘deg)‘; oS.style.transform = ‘rotate(‘+(s*6+ms/1000*6)+‘deg)‘; } clock(); setInterval(clock,30); } </script> </head> <body> <div id="box"> <div class="hour"></div> <div class="min"></div> <div class="sec"></div> <div class="cap"></div> </div> </body> </html>
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原文地址：http://www.cnblogs.com/zlx7/p/4971209.html
