var t = 0
var flag1
function studyTime()
{
hour=parseInt(t/60/60)
minute=parseInt(t/60%60)
second=parseInt(t%60)
document.getElementById('SECOND').innerHTML=second
document.getElementById('HOUR').innerHTML=hour
document.getElementById('MINUTE').innerHTML=minute
t = t + 1
flag1 = setTimeout("studyTime()", 1000)
}
你的时间用的不是中国的时区计算的,CST改成GMT+0800也就是var together = new Date("Tue Oct 02 15:40:00 GMT+0800 2015")