验证码：<input name="yzm" type="text" size="5" onblur="checkyzm();"><img src="getcode.asp">
<input name="yz" type="hidden" id="yz" value="<%=Session("GetCode")%>" />
<script>
function checkyzm()
{var yzm=document.getElementById("yzm").value;
var yz=document.getElementById("yz").value;
if(yzm=="")
{alert("验证码不能为空！");
return false;
}
if(yz!=yzm)
{alert("验证码不正确");
return false;
}
return true;

}
</script>

总是提示错误￣￣￣￣￣￣￣￣￣￣

下载是源文件：

[此贴子已经被作者于2007-5-8 12:44:12编辑过]

我就是想在客户端进行验证啊。其中session("getcode")为getcode.asp中的
getcode.asp

<%
Option Explicit
NumCode
Function NumCode()
Response.Expires = -1
Response.AddHeader "Pragma","no-cache"
Response.AddHeader "cache-ctrol","no-cache"
dim zNum,i,j
dim Ados,Ados1
Randomize timer
zNum = cint(8999*Rnd+1000)
Session("GetCode") = zNum
dim zimg(4),NStr
NStr=cstr(zNum)
For i=0 to 3
zimg(i)=cint(mid(NStr,i+1,1))
Next
dim Pos
set Ados=Server.CreateObject("Adodb.Stream")
Ados.Mode=3
Ados.Type=1
Ados.Open
set Ados1=Server.CreateObject("Adodb.Stream")
Ados1.Mode=3
Ados1.Type=1
Ados1.Open
Ados.LoadFromFile(Server.mappath("body.Fix"))
Ados1.write Ados.read(1280)
for i=0 to 3
Ados.Position=(9-zimg(i))*320
Ados1.Position=i*320
Ados1.write ados.read(320)
next
Ados.LoadFromFile(Server.mappath("head.fix"))
Pos=lenb(Ados.read())
Ados.Position=Pos
for i=0 to 9 step 1
for j=0 to 3
Ados1.Position=i*32+j*320
Ados.Position=Pos+30*j+i*120
Ados.write ados1.read(30)
next
next
Response.ContentType = "image/BMP"
Ados.Position=0
Response.BinaryWrite Ados.read()
Ados.Close:set Ados=nothing
Ados1.Close:set Ados1=nothing
End Function
%>

顶上去~