1. if..end if

<%
Dim myNum:myNum = 8
If myNum = 8 Then
Response.Write("你输入正确!")
End If
%>

　　2.if...else...end if

<%
Dim myNum:myNum = 10
If myNum = 10 Then
Response.Write("你输入正确!")
Else
Response.Write("你输入错误!")
End If
%>

　　3.if...elseif...else...end if

<%
Dim myNum:myNum = 10
If myNum > 10 Then
Response.Write("大于10")
ElseIf myNum = 10 Then
Response.Write("等于10")
Else
Response.Write("小于10")
End If
%>

　　4.嵌套使用

<%
Dim myNum:myNum = 10
if myNum>=0 then
if myNum=0 then
执行语句1
else
执行语句2
end if
else
执行语句3
end if
%>