使用JavaScript编写一个显示倒计时的定时器的例子代码

发布时间：2023-08-26 14:38:19 所属栏目：教程来源：

导读：如下所示：

代码如下:



<SCRIPT language=JavaScript1.2>

function setcountdown(theyear,themonth,theday){

yr=theyear;mo=themonth;da=theday

如下所示：

代码如下:



<SCRIPT language=JavaScript1.2>

function setcountdown(theyear,themonth,theday){

yr=theyear;mo=themonth;da=theday

}

setcountdown(2008,7,12)

var occasion="2008北京奥运会"

var message_on_occasion="盼望已久的时刻终于来到了!"

var countdownwidth='480px'

var countdownheight='20px'

var countdownbgcolor='tan'

var opentags='<font face="宋体"><small>'

var closetags='</small></font>'

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

var crosscount=''

function start_countdown(){

if (document.layers)

document.countdownnsmain.visibility="show"

else if (document.all||document.getElementById)

crosscount=document.getElementById&&!document.all?document.getElementById("countdownie") : countdownie

countdown()

}

if (document.all||document.getElementById)

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&&todayd==da){

if (document.layers){

document.countdownnsmain.document.countdownnssub.document.write(opentags+message_on_occasion+closetags)

document.countdownnsmain.document.countdownnssub.document.close()

}

else if (document.all||document.getElementById)

crosscount.innerHTML=opentags+message_on_occasion+closetags

return

}

else if (dday<=-1){

if (document.layers){

document.countdownnsmain.document.countdownnssub.document.write(opentags+"时间已经过了!"+closetags)

document.countdownnsmain.document.countdownnssub.document.close()

}

else if (document.all||document.getElementById)

crosscount.innerHTML=opentags+"Occasion already passed! "+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||document.getElementById)

crosscount.innerHTML=opentags+"还有 "+dday+ " 天, "+dhour+" 小时, "+dmin+" 分, "+dsec+" 秒就是 "+occasion+closetags

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