原文 链接 http://www.cnblogs.com/liygheart/p/3605160.html
<html> <head> <title>js 倒计时</title> </head> <body> <div> <h4>距离<input type="text" id="inputdate" value="2014-4-5"/> <button onclick="djs()">还有</button></h4> <div id="left"> </div> </div> </body> </html> <script LANGUAGE="javascript"> djs(); var timerID = null; var timerRunning = false; var year, month, day; function djs () { var inputdate = document.getElementById("inputdate").value; var splitdate = inputdate.split("-"); year = splitdate[0]; month = splitdate[1]; day = splitdate[2]; startclock(); } function showtime() { Today = new Date(); var NowHour = Today.getHours(); var NowMinute = Today.getMinutes(); var NowMonth = Today.getMonth(); var NowDate = Today.getDate(); var NowYear = Today.getYear(); var NowSecond = Today.getSeconds(); NowYear=1900+NowYear; Today = null; Hourleft = 23 - NowHour Minuteleft = 59 - NowMinute Secondleft = 59 - NowSecond Yearleft = year - NowYear Monthleft = month - NowMonth - 1 Dateleft = day - NowDate if (Secondleft<0){ Secondleft=60+Secondleft; Minuteleft=Minuteleft-1; } if (Minuteleft<0){ Minuteleft=60+Minuteleft; Hourleft=Hourleft-1; } if (Hourleft<0){ Hourleft=24+Hourleft; Dateleft=Dateleft-1; } if (Dateleft<0){ Dateleft=31+Dateleft; Monthleft=Monthleft-1; } if (Monthleft<0){ Monthleft=12+Monthleft; Yearleft=Yearleft-1; } Temp=Yearleft+'年-'+Monthleft+'月-'+Dateleft+'天 '+Hourleft+'时:'+Minuteleft+'分:'+Secondleft+'秒' document.getElementById("left").innerHTML=Temp; timerID = setTimeout("showtime()",1000); timerRunning = true; } var timerID = null; var timerRunning = false; function stopclock () { if(timerRunning){ clearTimeout(timerID); timerRunning = false; } } function startclock () { stopclock(); showtime(); } </script>
运行后效果: