I have an input text field with a `datepicker` instance from jquery-ui with the following parameters:

```
'buttonImageOnly': true,
'showOn': 'button',
'buttonImage': 'gfx/calendar.gif'

```

It works well. When I click the "calendar.gif" datepicker image, the calendar is shown. However, when I select a date, the input field (which was disabled) is changed.

Is this a bug or am I doing something wrong? When I look at the instance object in Firebug, the `disabled` parameter is set to `true`.