具体代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>限时抢购倒计时</title> <style type="text/css"> body{ text-align: center; } #first{ color:#ff7300; font-size:30px; margin-left:10px; } </style> <script type="text/javascript"> window.onload=function(){ setInterval(changTime, 500); function changTime(){ document.getElementById("time").innerHTML=getTime(); changeStyle(); } function gR() { return Math.floor(Math.random()*16); } function changeStyle(){ var ele=document.getElementById("time"); var size=Math.random()*40; ele.style.fontSize=((size+10)+"px"); var mc=new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"); ele.style.color="#"+mc[gR()]+mc[gR()]+mc[gR()]+mc[gR()]+mc[gR()]+mc[gR()]; } function getTime(){ var now=new Date().getTime(); var end=new Date("2015/12/20").getTime(); var temp=end-now; if(temp<=0) { document.getElementById("first").innerHTML="抢购活动已结束！！！！！"; return ""; }else { var temp2=new Date(); temp2.setTime(temp); var sec=Math.floor((temp)/1000%60); var min=Math.floor(temp/(60*1000)%60); var hou=Math.floor(temp/(60*60*1000)%24); var day=Math.floor(temp/(24*60*60*1000)); return day+"天 "+hou+"小时 "+min+"分钟 "+sec+"秒"; } } }; </script> </head> <body> <br/><br/><br/><br/><br/> <span>距离限时抢购还有 </span> <span></span> </body> </html>