js距离现在时间计算

<script language="javascript">

var biryear = 2015;

var birmonth = 12;

var birday = 11;

var year = new Date();

var getyear = year.getYear();

TMonth = new Array('Jan','Feb','Mar','Apr','May','June','July','Aug','Sep','Oct','Nov','Dec');

nowMonth = birmonth - 1;

bmonth = TMonth[nowMonth];

var timerid;

var timerRunning = false;

var today = new Date();

var startday = new Date();

var enday = new Date();

var minPerDay = 0;

var secsLeft = 0;

var secsRound = 0;

var secsRemain = 0;

var minLeft = 0;

var minRound = 0;

var minRemain = 0;

var timeRemain = 0;

function showtime() 

{

startday = new Date(""+bmonth+" "+birday+", "+biryear+" 00:00 EDT");

startday.setYear(""+biryear+"");

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 = ((hoursLeft - hoursRound) * 24 +12) : hoursRemain = 12 - ((hoursRound - hoursLeft) * 24);

hoursRemain = Math.round(hoursRemain - 0.5);

daysLeft = ((today.getTime() - startday.getTime()) / PerDay);

daysLeft = (daysLeft + 0.5);

daysRound = Math.round(daysLeft);

daysRemain = daysRound;

day_rem = " 天 "

hour_rem = " 小时 "

min_rem = " 分 "

sec_rem = " 秒 "

timeRemain =daysRemain + day_rem + hoursRemain + hour_rem + minRemain + min_rem + secsRemain + sec_rem;

document.up.face.value = timeRemain;

timerid = setTimeout("showtime()",1000);

timerRunning = true;

}

</script>

在html文件中

<FORM name=up onsubmit=1 align="center">

<INPUT class="forever"  value="计算出您的精彩人生！" name= "face" readonly onfocus="this.blur()" align="center">

</FORM>

input标签css样式

.forever {background-color:transparent;width:1000px;height:80px;text-align:center;font-size:80px;font-family:"微软雅黑";border-left: 0;border-top: 0;border-right: 0;border-bottom: 0;}