I have to combo box content change based on the selection on the other

Question

I have huge unsolve problem where by I have to combo box change content of the combo box based on the selection in the first combo box . The problem is The value changes do not have effect on the second combo box. Below is the content of the coding used for both the combo box.
function setReasonCode(obj){
                     <%String sql_query3 = "SELECT DISTINCT (ir_tran_typ) "+
                                          "  FROM intrcd ";
                           System.out.println("trans type"+sql_query3 );           
                            try{
                                rset = db.execSQL(sql_query3);
                            catch(SQLException e) {
                                System.err.println("Error in query - intrcd - transaction_main.jsp " +e +" sql " +sql_query3);
                            while(rset.next()){
                                tran_cde = rset.getString("ir_tran_typ");
                                        tran_typ.addElement(rset.getString("ir_tran_typ"));
                                        System.out.println("trans type 34 "+tran_typ );%>
                                        <% }%>
                                      alert(obj.value);
                              <%for(int i=0 ;i<tran_typ.size();i++){
                                 System.out.println("trans type 222  "+ tran_typ.size());
                                   tran_cde =tran_typ.elementAt(index).toString();%>
                                   <%System.out.println("trans type before "+ tran_cde);%> 
                                    eval(document.all.tran_cde.option
                                  if(D == <%=tran_cde%> ){
                                   <%System.out.println("trans type D"+ tran_cde);%>     
                                   <%String sql_query2 = "SELECT ir_rea_cde,ir_rea_desc"+
                                          "  FROM intrcd"+
                                          " WHERE ir_tran_typ = 'D' " +
                                                    " ORDER BY ir_rea_cde ";
                           System.out.println("query"+ sql_query2);           
                            try{
                                rset = db.execSQL(sql_query2);
                            catch(SQLException e) {
                                System.err.println("Error in query - emmast2 - transaction_main.jsp " +e +" sql " +sql_query2);
                                    index = 1;
                            while(rset.next()){
                                    rea_cde = rset.getString("ir_rea_cde");
                                    rea_desc =  rset.getString("ir_rea_desc");
                                   tran_typ.removeAllElements();
                                   }%>
                              if( R == obj.value){
                                   alert(R)
                                  if(R== <%=tran_cde%> ){
                                   <%System.out.println("trans type R"+ tran_cde);%>     
                                   <% sql_query2 = "SELECT ir_rea_cde,ir_rea_desc"+
                                          "  FROM intrcd"+
                                          " WHERE ir_tran_typ = 'R' " +
                                                    " ORDER BY ir_rea_cde ";
                           System.out.println("query 2"+ sql_query2 );           
                            try{
                                rset = db.execSQL(sql_query2);
                            catch(SQLException e) {
                                System.err.println("Error in query - intrcd - transaction_main.jsp " +e +" sql " +sql_query2);
                                    index = 1;
                            while(rset.next()){
                                    rea_cde = rset.getString("ir_rea_cde");
                                    rea_desc =  rset.getString("ir_rea_desc");
                                   }%>
          <%}%>
            }

Answer 1

Not unless you know which file in the app sets the choices. I've been through it pretty thoroughly and can't find the one.