时间倒数

1.将下面的代码复制到显示的位置即可

/*
Dynamic countdown Script- 
� Dynamic Drive (www.dynamicdrive.com)
For full source code, installation instructions,
100's more DHTML scripts, and Terms Of
Use, visit dynamicdrive.com
*/

function setcountdown(theyear,themonth,theday){
yr=theyear;mo=themonth;da=theday
}

//////////CONFIGURE THE COUNTDOWN SCRIPT HERE//////////////////

//STEP 1: Configure the countdown-to date, in the format year, month, day:
setcountdown(2000,12,25)

//STEP 2: Change the two text below to reflect the occasion, and message to display on that occasion, respectively
var occasion="Christmas!"
var message_on_occasion="Merry Christmas!"

//STEP 3: Configure the below 5 variables to set the width, height, background color, and text style of the countdown area
var countdownwidth='518px'
var countdownheight='20px'
var countdownbgcolor='lightblue'
var opentags='<font face="Verdana"><small>'
var closetags='</small></font>'

//////////DO NOT EDIT PASS THIS LINE//////////////////

var montharray=new Array("Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec")

function start_countdown(){
if (document.layers)
document.countdownnsmain.visibility="show"
countdown(2000,1,1)
}

if (document.all)
document.write('<span id="countdownie" style="width:'+countdownwidth+'; background-color:'+countdownbgcolor+'"></span>')

window.onload=start_countdown

function countdown(){
var today=new Date()
var todayy=today.getYear()
if (todayy < 1000)
todayy+=1900
var todaym=today.getMonth()
var todayd=today.getDate()
var todayh=today.getHours()
var todaymin=today.getMinutes()
var todaysec=today.getSeconds()
var todaystring=montharray[todaym]+" "+todayd+", "+todayy+" "+todayh+":"+todaymin+":"+todaysec
futurestring=montharray[mo-1]+" "+da+", "+yr
dd=Date.parse(futurestring)-Date.parse(todaystring)
dday=Math.floor(dd/(60*60*1000*24)*1)
dhour=Math.floor((dd%(60*60*1000*24))/(60*60*1000)*1)
dmin=Math.floor(((dd%(60*60*1000*24))%(60*60*1000))/(60*1000)*1)
dsec=Math.floor((((dd%(60*60*1000*24))%(60*60*1000))%(60*1000))/1000*1)
if(dday<=0&&dhour<=0&&dmin<=0&&dsec<=1){
if (document.layers){
document.countdownnsmain.document.countdownnssub.document.write(opentags+message_on_occasion+closetags)
document.countdownnsmain.document.countdownnssub.document.close()
}
else if (document.all)
countdownie.innerHTML=opentags+message_on_occasion+closetags
return
}
else{
if (document.layers){
document.countdownnsmain.document.countdownnssub.document.write(opentags+dday+ " days, "+dhour+" hours, "+dmin+" minutes, and "+dsec+" seconds left until "+occasion+closetags)
document.countdownnsmain.document.countdownnssub.document.close()
}
else if (document.all)
countdownie.innerHTML=opentags+dday+ " days, "+dhour+" hours, "+dmin+" minutes, and "+dsec+" seconds left until "+occasion+closetags
}
setTimeout("countdown()",1000)
}
</script>