要完成此效果需要三个步骤
第一步：把如下代码加入到<head>区域中
<script LANGUAGE="Javascript">
<!-- Begin
var byear = prompt(‘请输入你的出生年份‘,‘1976‘);
var mm = prompt(‘请输入你的出生月份‘,‘11‘);
var bday = prompt(‘请输入你的出生日‘,‘2‘);
var year = new Date();
var year2 = year.getYear();
var year3 = (year < 2000) ? year2 + 1900 : year2;
thedate = new Date();
mm2 = thedate.getMonth() + 1;
dd2 = thedate.getDate();
yy2 = thedate.getYear();
if (yy2 < 100) yy2 += 1900
yourage = yy2 - byear;
if (mm2 < mm) yourage--;
if ((mm2 == mm) && (dd2 < bday)) yourage--;
TMonth = new Array(
‘January‘,‘February‘,‘March‘,
‘April‘,‘May‘,‘June‘,‘July‘,
‘August‘,‘September‘,‘October‘,
‘November‘,‘December‘
);
CurMonth = mm - 1;
bmonth = TMonth[CurMonth];
var age2 = yourage + 1;
var timerID;
var timerRunning = false;
var today = new Date();
var startday = new Date();
var enday = new Date();
var secPerDay = 0;
var minPerDay = 0;
var hourPerDay = 0;
var secsLeft = 0;
var secsRound = 0;
var secsRemain = 0;
var minLeft = 0;
var minRound = 0;
var minRemain = 0;
var timeRemain = 0;
function stopclock() {
if(timerRunning)
clearTimeout(timerID);
timerRunning = false;
}
function startclock() {
stopclock();
showtime();
showtime1();
}
function showtime() {
today = new Date();
enday = new Date(""+bmonth+", "+bday+" "+year3+" 00:00");
enday.setYear(""+year3+"");
secsPerDay = 1000 ;
minPerDay = 60 * 1000 ;
hoursPerDay = 60 * 60 * 1000;
PerDay = 24 * 60 * 60 * 1000;
secsLeft = (enday.getTime() - today.getTime()) / minPerDay;
secsRound = Math.round(secsLeft);
secsRemain = secsLeft - secsRound;
secsRemain = (secsRemain < 0) ? secsRemain = 60 - ((secsRound - secsLeft) * 60) : secsRemain =
(secsLeft - secsRound) * 60;
secsRemain = Math.round(secsRemain);
minLeft = ((enday.getTime() - today.getTime()) / hoursPerDay);
minRound = Math.round(minLeft);
minRemain = minLeft - minRound;||| minRemain = (minRemain < 0) ? minRemain = 60 - ((minRound - minLeft) * 60) : minRemain =
((minLeft - minRound) * 60);
minRemain = Math.round(minRemain - 0.495);
hoursLeft = ((enday.getTime() - today.getTime()) / PerDay);
hoursRound = Math.round(hoursLeft);
hoursRemain = hoursLeft - hoursRound;
hoursRemain = (hoursRemain < 0) ? hoursRemain = 24 - ((hoursRound - hoursLeft) * 24) :
hoursRemain = ((hoursLeft - hoursRound) * 24);
hoursRemain = Math.round(hoursRemain - 0.5);
daysLeft = ((enday.getTime() - today.getTime()) / PerDay);
daysLeft = (daysLeft - 0.5);
daysRound = Math.round(daysLeft);
daysRemain = daysRound;
if (daysRemain == 1) day_rem = " 天, "
else day_rem = " 天, "
if (hoursRemain == 1) hour_rem = " 小时, "
else hour_rem = " 小时, "
if (minRemain == 1) min_rem = " 分钟, "
else min_rem = " 分钟, "
if (secsRemain == 1) sec_rem = " 秒"
else sec_rem = " 秒"
timeRemain = daysRemain + day_rem + hoursRemain + hour_rem + minRemain + min_rem + secsRemain +
sec_rem;
document.down.face.value = timeRemain;
timerID = setTimeout("showtime()",1000);
timerRunning = true;
if (daysRemain < 0) year3 = year3 + 1
}
function showtime1() {
startday = new Date(""+bmonth+" "+bday+", "+byear+" 00:00 EDT");
startday.setYear(""+byear+"");
today = new Date();
secsPerDay = 1000 ;
minPerDay = 60 * 1000 ;
hoursPerDay = 60 * 60 * 1000;
PerDay = 24 * 60 * 60 * 1000;
secsLeft = (today.getTime() - startday.getTime()) / minPerDay;
secsRound = Math.round(secsLeft);
secsRemain = secsLeft - secsRound;
secsRemain = (secsRemain < 0) ? secsRemain = 60 - ((secsRound - secsLeft) * 60) : secsRemain =
(secsLeft - secsRound) * 60;
secsRemain = Math.round(secsRemain);
minLeft = ((today.getTime() - startday.getTime()) / hoursPerDay);
minRound = Math.round(minLeft);
minRemain = minLeft - minRound;
minRemain = (minRemain < 0) ? minRemain = 60 - ((minRound - minLeft) * 60) : minRemain =
((minLeft - minRound) * 60);
minRemain = Math.round(minRemain - 0.495);
hoursLeft = ((today.getTime() - startday.getTime()) / PerDay);
hoursRound = Math.round(hoursLeft);
hoursRemain = hoursLeft - hoursRound;
hoursRemain = (hoursRemain < 0) ? hoursRemain = 24 - ((hoursRound - hoursLeft) * 24) :
hoursRemain = ((hoursLeft - hoursRound) * 24);
hoursRemain = Math.round(hoursRemain - 0.5);
daysLeft = ((today.getTime() - startday.getTime()) / PerDay);
daysLeft = (daysLeft - 0.5);
daysRound = Math.round(daysLeft);
daysRemain = daysRound;
if (daysRemain == 1) day_rem = " 天, "
else day_rem = " 天, "
if (hoursRemain == 1) hour_rem = " 小时, "
else hour_rem = " 小时, "
if (minRemain == 1) min_rem = " 分钟, "
else min_rem = " 分钟, "
if (secsRemain == 1) sec_rem = " 秒"
else sec_rem = " 秒"
timeRemain = daysRemain + day_rem + hoursRemain + hour_rem + minRemain + min_rem + secsRemain +
sec_rem;
document.up.face.value = timeRemain;
timerID = setTimeout("showtime1()",1000);
timerRunning = true;
}
// End -->
</script>
|||
第二步：把如下代码加入到<body>区域中
<center>
<form name="down" onSubmit="0">
<script Language="Javascript">
document.write("<b>你的出生日是："+byear+" 年 "+mm+" 月 "+bday+" 日 .
("+mm+"/"+bday+"/"+byear+")</b>");
document.write("<br><br>今年你已经 "+yourage+" 岁了, 你离 "+age2+" 岁还有:");
</script>
<br>
<input type="text" name="face" size="47" value="A browser supporting Javascript 1.1+ is needed.">
</form>
<p>
<br>
<form name="up" onSubmit="1">
以下是你在这世上存活的时间<br>
<input type="text" name="face" size="47" value="A browser supporting Javascript 1.1+ is needed.">
</form>
</center>
第三步：把“OnLoad="startclock()"”加在<body>标记里
例如：<body OnLoad="startclock()">
