<%
'判斷是否按下了確定按鈕，如果按下了，則對比驗(yàn)證碼是否輸入正確
If Request.QueryString("submit") <> "" Then
      Dim checkCode
      checkCode = Trim(Request.QueryString("checkCode"))
      If checkCode = Session("psn") Then
             Response.Write("<script>alert('驗(yàn)證碼正確');</script>")
      Else
             Response.Write("<script>alert('驗(yàn)證碼錯(cuò)誤');</script>")
      End If
End If
%>
<form action="test.asp" method="get">
<input type="text" name="checkCode" />
<img src="code.asp" />
<input type="submit" name="submit" value="確定">
</form>

<img src="code.asp" />
<%=session("psn")%>

<img src="code.asp" />
<%=session("psn")%>