当天数是0时如何判断出倒计时时间
例 显示出：距开业时间还有24小时20分
<%
response.write "距开业时间还有"
response.write "<font color=blue><u>"
response.write DateDiff("d",Date(),"2007-10-18")
response.write "</font></u>"
response.write "天"
%>

<%
response.write "距开业时间还有"
response.write "<font color=blue><u>"
response.write DateDiff("n",now(),"2007-10-18 10:30:00")\60&"时"&DateDiff("n",now(),"2007-10-18 10:30:00") mod 60&"分"
response.write "</font></u>"
%>

蓝色部分是 开业时间

这个只是能算出时间来，比如我们31日开业，那平时是计算出差几天，到最后一天计算出并显示是差几小时几分

<%
response.write "距开业时间还有"
response.write "<font color=blue><u>"
IF DateDiff("d",Date(),"2007-10-18")=0 Then
Response.write DateDiff("h",now(),"2007-10-18 10:30:00")"时"&DateDiff("m",now(),"2007-10-18 10:30:00")&"分"
Else
Response.write DateDiff("d",Date(),"2007-10-18")
End IF
response.write "</font></u>"
%>

<%
dim d,m,t1
t1="2007-10-31 10:30:00" 't1为开业时间
d=DateDiff("n",now(),t1)
if d\60\24=0 then
m=""
else
m=d\60\24&"天"
end if
response.write "距开业时间还有"
response.write "<font color=blue><u>"
response.write m&(d\60) mod 24&"时"&d mod 60&"分"
response.write "</font></u>"
%>

还有个问题，时间不会走，一直就在那个时间内停着不动，要刷新才可以，能不能让他自动走啊

[此贴子已经被作者于2007-10-19 15:05:18编辑过]

[CODE]<script language="vbscript">
setTimeout "clock", 1000
sub clock()
t1="2007-10-31 10:30:00"
num=datediff("s",now(),t1)
s=num mod 60&"秒"
m=(num\60) mod 60
if m=0 then
m=""
else
m=m&"分"
end if
h=(num\60\60) mod 24
if h=0 then
h=""
else
h=h&"时"
end if
d=num\60\60\24
if d=0 then
d=""
else
d=d&"天"
end if
NowTime=d& h & m & s
NowT.InnerHtml=NowTime
setTimeout "clock", 1000
end sub
</script>
<font color="#0000FF" ID="NowT">[/CODE]

楼上代码不错，简化一下
[CODE]<script language="vbscript">
setTimeout "clock()",1000
sub clock()
num=datediff("s",now(),"2007-10-20 0:00:00")
d= num\60\60\24
h=(num\60\60) mod 24
m=(num\60) mod 60
s= num mod 60
if d<>0 then d1=d&"天" end if
if h<>0 then h1=h&"时" end if
if m<>0 then m1=m&"分" end if
if s<>0 then s1=s&"秒" end if
NowT.InnerHtml=d1 & h1 & m1 & s1
setTimeout "clock()",1000
end sub
</script>
<font color="#0000FF" ID="NowT"></font>[/CODE]

倒计时到年的，不知道为什么与实际差两三天
[CODE]<script language="vbscript">
setTimeout "clock()",1000
sub clock()
num=datediff("s",now(),"2008-11-21 0:00:00")
y= num\60\60\24\30\12
m=(num\60\60\24\30) mod 12
d=(num\60\60\24) mod 30
h=(num\60\60) mod 24
n=(num\60) mod 60
s= num mod 60
if y<>0 then y1=y&"年" end if
if m<>0 then m1=m&"月" end if
if d<>0 then d1=d&"天" end if
if h<>0 then h1=h&"时" end if
if n<>0 then n1=n&"分" end if
if s<>0 then s1=s&"秒" end if
NowT.InnerHtml=y1 & m1 & d1 & h1 & n1 & s1
setTimeout "clock()",1000
end sub
</script>
<font color="#0000FF" ID="NowT"></font>[/CODE]

有没有判断闰年？会不会是这里的问题