日历程序，谁能帮我解释下：<% %>之间的代码啊。
<%@ Language=VBScript %><Html>
<Title>
小日历
</title>
<body>
<%
Function CountDays(iMonth,iYear)
Select Case iMonth
case 1,3,5,7,8,10,12
CountDays=31
case 2
if IsDate("2/29/" & iYear) Then
CountDays=29
else
CountDays=28
end if
case 4,6,9,11
CountDays=30
End Select
End Function
Function FirstDay(iMonth,iYear)
FirstDay=WeekDay(iMonth & "/1/" & iYear)
End Function
dim mMonth,mYear
mMonth=Month(Date())
mYear=Year(Date())
mDate=Day(Date())
response.write "<center>" & mYear & "年" & mMonth & "月" & "</center><hr>"
%>
<table border=1 align=center><tr>
<td align=right>星期日</td>
<td align=right>星期一</td>
<td align=right>星期二</td>
<td align=right>星期三</td>
<td align=right>星期四</td>
<td align=right>星期五</td>
<td align=right>星期六</td>
</tr><tr>
<%
j=1
for i=1 to 42
response.write "<td align=right>"
if i>=FirstDay(mMonth,mYear) and j<=CountDays(mMonth,mYear) then
if mDate=j then
response.write "<font color=blue>" & j & " </font>"
else
response.write j
end if
j=j+1
else
response.write " ? "
end if
response.write "</td>"
if i mod 7=0 then
response.write "</tr><tr>"
end if
next
%>
</tr></table>
</body>
</html>
谁能帮我解释下：<% %>之间的代码啊。
如J=1代表哪些意思啊。
