Jdbc Login Page Validation using Combobox

I got Login By this code i want to login by validating with combobox....The link which you send its without combobox.i m unable to get login by verifying with combo box..Ex banglore if i select it need to validate username and pass word with place bangalore....please help me i dont know how to validate the combobox for diffrent cities please help me by validating with combobox....

<form action="authenticateUserServlet" method="POST">
<table>
<tr><td align="left">Username</td><td><input type="text" name="username" size="20"></td></tr>
<tr><td align="left">Password:</td><td><input type="password" name="password" size="20"></td></tr>
<tr><td align="left">Cities:</td><td><select style=width:180px><option value="bangalore">bangalore</option>value="mangalore">mangalore</option><option value="hma">hma</option></select></td></tr>
<tr><td colspan="2"><input type="submit" value="Login"><input type="reset" Value="Cancel" ></input></td></tr>
</table>
</form>

servlets:- 
package myservlets; import java.io.*; import java.sql.*; import javax.servlet.*; import javax.servlet.http.*;

public class authenticateUserServlet extends HttpServlet { @Override public void init(ServletConfig config) throws ServletException { super.init(config); }

protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {

response.setContentType("text/html"); PrintWriter pw = response.getWriter(); String name = request.getParameter("username"); String password = request.getParameter("password");

try{ String driver = "org.postgresql.Driver"; Class.forName(driver).newInstance();

Connection con=null; Statement stmt=null;

String url="jdbc:postgresql://192.168.10.32/blrtaxi"; con=DriverManager.getConnection("jdbc:postgresql://localhost:5432/manju","postgres", "password"); stmt=con.createStatement(); String query = "select uname,password from dblogin where uname='"+name+"' and password='"+password+"'"; System.out.println(query); ResultSet rs = stmt.executeQuery(query);

if(rs.next()){

response.sendRedirect("Menu.jsp"); } else{ response.sendRedirect("index.jsp"); } }

catch(Exception e){ System.out.println(e.getMessage()); } } }

I want login username,password and combobox By sessions please help me.... Thanks for reply.

Thanks and Regards Manjunath Surpur