try {

        username1=request.getParameter("txt1");
        password1=request.getParameter("p1");
        nickname1=request.getParameter("nick_name1");
        email1=request.getParameter("email_1");
        phone_no1=request.getParameter("phone_no_1");
        date1=request.getParameter("date");
        month1=request.getParameter("month");
        year1=request.getParameter("year");
        school1=request.getParameter("school_1");
        class1=request.getParameter("class_1");
        section1=request.getParameter("section_1");

        // username1, password1, nickname1, email1, phone_no1 - should be unique //

        Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
        con=DriverManager.getConnection("jdbc:odbc:harshan_web");

        if (con != null)
        {

            st=con.createStatement();

           ResultSet rs=st.executeQuery("select * from account_registration where username='"+username1+"' or password='"+password1+"' or nickname='"+nickname1+"' or email='"+email1+"' or phone='"+phone_no1+"'");


                if (rs.next())
                {

                u1 = rs.getString("username");
                p1 = rs.getString("password");
                n1 = rs.getString("nickname");
                e1 = rs.getString("email");
                ph1 = rs.getString("phone");
                invalid_data = "";


            if (username1.equals(u1))
            { u2="Username "; }
            else
            { u2=""; }
            if (password1.equals(p1))
            { p2="Password "; }
            else
            { p2=""; }
            if (nickname1.equals(n1))
            { n2="Nickname "; }
            else
            { n2=""; }
            if (email1.equals(e1))
            { e2="Email-ID "; }
            else
            { e2=""; }
            if (phone_no1.equals(ph1))
            { ph2="Phone-Number "; }
            else
            { ph2=""; }

            invalid_data=""+u2+""+p2+""+n2+""+e2+""+ph2+" has/have already been used! Try Again.";
            response.sendRedirect("index.jsp?invalid_data="+invalid_data+"");

            }
                else
                {

                st.executeUpdate("insert into account_registration values('"+username1+"','"+password1+"','"+nickname1+"','"+date1+"','"+month1+"','"+year1+"','"+school1+"','"+class1+"','"+section1+"','"+email1+"','"+phone_no1+"')");
                response.sendRedirect("reg_complete.html");

                }
        }

        else
        {
            response.sendRedirect("error.html");
        }

        /* TODO output your page here. You may use following sample code. */

    } catch (Exception e) {}
      finally {
        out.close();
    }

if (rs.next())
            {

st.executeUpdate("insert into account_registration values('"+username1+"','"+password1+"','"+nickname1+"','"+date1+"','"+month1+"','"+year1+"','"+school1+"','"+class1+"','"+section1+"','"+email1+"','"+phone_no1+"')");