当用户输入的验证码出错时,我使用以下语句
Response.Write"<script language=JavaScript>"
Response.Write"alert(""请输入正确的验证码"");"
Response.Write"window.location='regist.asp','top'"
Response.Write"</script>"
response.end
end if
但是为何用Response.Write"window.location='regist.asp','top'"语句跳转到regist.asp时,用户之前输入的信息会没有了?

我有试过这个语句 Response.Write"<script language=JavaScript>"
Response.Write"alert('请输入正确的验证码');"
Response.Write"javascript:history.Go(-1)"
Response.Write"</script>"
但是返回不到regist.asp.

为什么没人的?请各位帮帮忙

Response.Write"javascript:history.Go(-1)"

把这段改成：Response.Write"javascript:history.back(-1)"试试！！！！！

你要写关于验证的程序我建议你要么就写ＪＡＶＡＳＣＲＩＰＴ函数function
或者是直接用ＶＢscript写，我给你一个你试试！
这是一个用户注册的代码：
<!--#include file="conn.asp"-->
<% if request.Form("user")="" then
response.Write"<script language=javascript>alert('请输入用户名');history.back(-1);</script>"
response.End()
end if
if request.Form("pwd")="" then
response.Write"<script language=javascript>alert('请输入密码');history.back(-1);</script>"
response.End()
end if
if request.Form("pwd2")="" then
response.Write"<script language=javascript>alert('请再次输入密码');history.back(-1);</script>"
response.End()
end if
pwd=trim(request.Form("pwd"))
pwd2=trim(request.Form("pwd2"))
if not pwd=pwd2 then
response.Write"<script language=javascript>alert('两次密码输入不一致！请重新输入！');history.back(-1);</script>"
response.End()
end if
if request.Form("email")="" then
response.Write"<script language=javascript>alert('请输入邮箱');history.back(-1);</script>"
response.End()
end if
For I=1 to Len(request.Form("email"))
If Mid(request.Form("email"),i,1)="@" Then
Flag=1
End If
next
if Flag<>1 then
response.Write"<script language=javascript>alert('请输入合法的邮箱地址！');history.back(-1);</script>"
end if
if request.Form("question")="" then
response.Write"<script language=javascript>alert('请输入密码提示问题！');history.back(-1);</script>"
response.End()
end if
if request.Form("answer")="" then
response.Write"<script language=javascript>alert('请输入密码提示答案！');history.back(-1);</script>"
response.End()
end if
user=request.Form("user")
pwd=request.Form("pwd")
sex=request.Form("sex")
qq=request.Form("QQ")
email=request.Form("email")
underwrite=request.Form("underwrite")
question=request.Form("question")
answer=request.Form("answer")
image=request.Form("ihead")

set rs=server.createobject("adodb.recordset")
set rs1=server.createobject("adodb.recordset")
sql="select * from login where user='"&user&"'"
rs.open sql,conn,1,3
if rs.EOF or rs.BOF then
rs1.open"login",conn,1,3
rs1.addnew array("user","pwd","sex","QQ","email","underwrite","question","answer","image"),_
array(user,pwd,sex,QQ,email,underwrite,question,answer,image)
%>
<script language="vbscript">
window.location.href="login_2.asp"
</script>
<%
rs1.close
set rs1=nothing
%>
<%
else
%>
<script language="vbscript">
alert("对不起！此用户已存在！")
history.back
</script>
<%
end if
rs.Close
set rs=nothing
%>

给你一个用户注册验证的代码！
<!--#include file="conn.asp"-->
<% if request.Form("user")="" then
response.Write"<script language=javascript>alert('请输入用户名');history.back(-1);</script>"
response.End()
end if
if request.Form("pwd")="" then
response.Write"<script language=javascript>alert('请输入密码');history.back(-1);</script>"
response.End()
end if
if request.Form("pwd2")="" then
response.Write"<script language=javascript>alert('请再次输入密码');history.back(-1);</script>"
response.End()
end if
pwd=trim(request.Form("pwd"))
pwd2=trim(request.Form("pwd2"))
if not pwd=pwd2 then
response.Write"<script language=javascript>alert('两次密码输入不一致！请重新输入！');history.back(-1);</script>"
response.End()
end if
if request.Form("email")="" then
response.Write"<script language=javascript>alert('请输入邮箱');history.back(-1);</script>"
response.End()
end if
For I=1 to Len(request.Form("email"))
If Mid(request.Form("email"),i,1)="@" Then
Flag=1
End If
next
if Flag<>1 then
response.Write"<script language=javascript>alert('请输入合法的邮箱地址！');history.back(-1);</script>"
end if
if request.Form("question")="" then
response.Write"<script language=javascript>alert('请输入密码提示问题！');history.back(-1);</script>"
response.End()
end if
if request.Form("answer")="" then
response.Write"<script language=javascript>alert('请输入密码提示答案！');history.back(-1);</script>"
response.End()
end if
user=request.Form("user")
pwd=request.Form("pwd")
sex=request.Form("sex")
qq=request.Form("QQ")
email=request.Form("email")
underwrite=request.Form("underwrite")
question=request.Form("question")
answer=request.Form("answer")
image=request.Form("ihead")

set rs=server.createobject("adodb.recordset")
set rs1=server.createobject("adodb.recordset")
sql="select * from login where user='"&user&"'"
rs.open sql,conn,1,3
if rs.EOF or rs.BOF then
rs1.open"login",conn,1,3
rs1.addnew array("user","pwd","sex","QQ","email","underwrite","question","answer","image"),_
array(user,pwd,sex,QQ,email,underwrite,question,answer,image)
%>
<script language="vbscript">
window.location.href="login_2.asp"
</script>
<%
rs1.close
set rs1=nothing
%>
<%
else
%>
<script language="vbscript">
alert("对不起！此用户已存在！")
history.back
</script>
<%
end if
rs.Close
set rs=nothing
%>

好的``謝謝```

可以啦```感謝感謝````

不过照理response.write"Javascript:history.GO(-1)"不可以的?真是奇怪`````~~

咦```楼上楼上楼上的验证也不错```
不过用这么多if语句会不会不好的?因为我听我的朋友说过尽量少用if语句,必要时可以用另外一此语句替代.