hello i m working on asp 3.0

and have login screen and i m using the following code for userid and passwor
Code:

<!--#include file="Connection.inc"-->



<html>
<head>
<%


CheckLogin


Sub CheckLogin
if ( (Request.form("Login") <> "") and  (Request.form("password") <> ""))  then
SQL_query = "SELECT Admin.Login, Admin.Pwrd  FROM Admin WHERE Admin.Login = '" & Request.form("Login") & "' AND Admin.pwrd = '" & Request.form("Password") & "'"
'dim b
	Set RS = ChuckemConn.Execute(SQL_query)
	WHILE NOT RS.EOF
	if RS.fields("Login")= Request.form("Login")  and RS.fields("pwrd")= Request.form("Password") then
	 'response.write("Welcome to Administrator Area")
	Session("UserLoggedIn") = "true"
	Response.redirect("Games.asp")
	
	end if
     RS.MoveNext 
     WEND



if (Session("UserLoggedIn") = "false") then
Response.write("In valid user name and password")
end if

RS.close
ChuckemConn.Close

end if
End Sub


%>



<script Language="JavaScript">
<!-- 
function Blank_TextField_Validator()
{
// Check the value of the element named text_name
// from the form named f1
if (f1.Login.value == "")
{
// If null display and alert box
alert("Enter Login Name.");
// Place the cursor on the field for revision
f1.Login.focus();
// return false to stop further processing
return (false);
}
// If Login is not null continue processing


else if (f1.Password.value == "")
{
// If null display and alert box
alert("Enter Password .");
// Place the cursor on the field for revision
f1.Password.focus();
// return false to stop further processing
return (false);
}
// If Login is not null continue processing



return (true);
}
-->
</script>

</head>
<body>
 <table border=0 width=100% height=100%><tr><td>
<form method="Post" name="f1" action="Login.asp" onsubmit="return Blank_TextField_Validator()">
 

     <table  align="center">
            <tr bgcolor="3399FF">
                <td  align=center colspan=2  color: navy;">
                    &nbsp;Admin &nbsp;Login</td>
                
            </tr>
            <tr bgcolor="99CCFF">
                <td >Enter Login
                </td>
                <td><input type="text" name="Login" />

                </td>
            </tr>
            <tr bgcolor="99CCFF">
                <td>Enter Password
                </td>
                <td><input type="Password" name="Password" />

                </td>
            </tr>
            
          
            <tr bgcolor="99CCFF">
                <td align="center" colspan=2><input type="submit" value="Login" />

                </td>
                
            </tr>
         </table>
</form></td></tr>

</table>


</body>
</html>
I want that if user input wrong userid and password the screen should prompt In valid userid and password..

i write these statemnet to check
Code:
if (Session("UserLoggedIn") = "false") then
Response.write("In valid user name and password")
end if
but its useless
could any one let me know how to show error mesage on same page