Login thru JSP not working?

Hello
I am trying to login thru JSP, Web Server is Tomcat & database is sqlserver2000. After filling user, password & pressing submit button,error message is as follows :
cannot resolve symbol
symbol : variable connection
location: class org.apache.jsp.verifyuser_jsp
Statement statement = connection.createStatement();
This is the code :
<BODY>
<% String user = request.getParameter("user");%>
<% String pwd = request.getParameter("pwd");%>
<%
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection connection = DriverManager.getConnection(
"jdbc:odbc:DEVELOPER1","sa","");
System.out.println("database connected");
Statement statement = connection.createStatement();
String query1 = "SELECT Username, Password FROM login WHERE Username = '"+user+"' AND Password = '"+pwd+"'";
ResultSet p = statement.executeQuery(query1);
while (p.next())
String Puser = p.getString("Username");
String Ppass = p.getString("Password");
if (user.equals("Puser") && pwd.equals("Ppass"))
%>
<jsp:forward page = "welcome.jsp"/>
<% else { %>
<h3>Invalid username or password</h3>
<% }
connection.close();
catch (Exception e)
out.println(e.getMessage());
%>
<h3>error in accessing database</h3>
<% }
%>
</BODY>
what's wrong?

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