[Users] How to ignore field in the FormPanel

[Daniel Kastl]

Hi list,

I'm using the GeoExt.form.FormPanel and I have a collapsable fieldset in 
my form:

{
    xtype : 'fieldset',
    title : 'My Fieldset with Chseckbox',
    checkboxToggle: true,
    // checkboxName: 'name_has_no_effect',
    collapsed: true,
    ....
}

When I now submit the form the WFS complains

<ows:Exception exceptionCode="InvalidParameterValue">
    <ows:ExceptionText>Illegal property name: ext-comp-1005-checkbox</ows:ExceptionText>
</ows:Exception>

... because it also submits this checkbox of my fieldset.

Is there an easy way to prevent fields being submitted ...
(a) maybe through ExtJS, or
(b) add by adding an identifier to GeoExt.form.toFilter.FILTER_MAP that 
will ignore a field name?

Best regards,

Daniel