请教高手一个session的问题
....
<%
dim vote,counter1,counter2,repeat
application.lock
vote=request("vote")
counter1=readcounter("vote1.txt")
counter2=readcounter("vote2.txt")
if (vote<>empty) and (session("repeat")=true) then
response.write"Voted!"
response.end
end if
while(vote<>empty) and (session("repeat")<>true))
if vote="star1" then
counter1=counter1+1
writecounter "vote1.txt",counter1
elseif vote="star2" then
counter2=counter2+1
writecounter "vote2.txt",counter2
end if
session("repeat")=true
wend
application.unlock
%>
....
这是在下参考书上一个票选活动的实例代码,点击图片后返回vote,用repeat记录是否已经投过票。
请问下,if (vote<>empty) and (session("repeat")=true) then 为什么还要对vote进行判断?
看书没看明白,高人指点一下,谢谢!