CodingForums.com - Change event that enables a text field.

Hello,

I am relatively new programmer and was wondering if I anyone could help me figure this out. I am using Sencha touch 2 and I want to enable a text field after a selection is made in my select field. I wanted to accomplish this by using a listener, but I am not entirely sure how I would go about doing so.

In the following code, I used a listener to open up a message box, so I see how the listener functions, but I am not sure how I would go about replacing that Msg box with a text field.

Code:

                     {

                        xtype:'selectfield',

                        name:'drugs',

                        label: 'Do you take recreational drugs?',

                        labelWidth: 600,

                             options:[

                                 

                                {text:'no', value: 'no'},

                                {text:'yes', value: 'yes'},

                                {text:'N/A', value: 'na'},

                                ],

                                                            

                                listeners: {

                                change: function (select, newValue, oldValue) {

                                    Ext.Msg.alert('change', newValue.data.value);

                                } 

                                }

                                },

Any help with this situation would be very appreciated.