js,倒计时本文实例为大家分享了JavaScript实现限时抢购，供大家参考，具体代码如下 运行效果图： 
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 id="first">距离限时抢购还有 </span> <span id="time"></span></body></html>希望本文实例希望对大家学习javascript程序设计有所帮助。
js,倒计时
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