Question

求教asp中if语句的格式

麻烦大能给看下页面中我的if语句这样写是否正确
<td align="center">
<script language = "JavaScript">
<%dim pic
pic=request.QueryString("BigClassID")
if pic="16" then response.Write "<img src='images/1.jpg' width='700' height='165' />"
if pic="24" then response.Write "<img src='images/2.jpg' width='700' height='165' />"
if pic="25" then response.Write "<img src='images/3.jpg' width='700' height='165' />"
else response.Write "<img src='images/4.jpg' width='700' height='165' />"
end if%></script></td>

Answer 1

不对，看你的意思，应该是想写成

if pic="16" then response.Write "<img src='images/1.jpg' width='700' height='165' />"
elseif pic="24" then response.Write "<img src='images/2.jpg' width='700' height='165' />"
elseif pic="25" then response.Write "<img src='images/3.jpg' width='700' height='165' />"
else response.Write "<img src='images/4.jpg' width='700' height='165' />"
end if

如果之前你写的，若pic=16，会执行response.Write "<img src='images/1.jpg' width='700' height='165' />" 和 response.Write "<img src='images/4.jpg' width='700' height='165' />"两条
而且你有三个if只有一个end if 程序都无法正常的执行…………

Answer 2

错误的
正确应该是这样

<%dim pic
pic=request.QueryString("BigClassID")
if pic="16" then response.Write "<img src='images/1.jpg' width='700' height='165' />" else
if pic="24" then response.Write "<img src='images/2.jpg' width='700' height='165' />" else
if pic="25" then response.Write "<img src='images/3.jpg' width='700' height='165' />"
else response.Write "<img src='images/4.jpg' width='700' height='165' />"
end if%></script></td>