[TYPO3-mvc] TCA and switching form parts

[JR]

Hey,

I'm writing my first extension, a product catalog based on extbase and
fluid. 
In the backend I organize the forms with TCA.  Each product should have
different technical data depending on the category.

Example:
Category: "Induktion"
Product with special attributes depending on "Induktion"
* EAN
* Height
* Width

Category: "Multifunktionsgerät"
Product with special attributes depending on "Multifunktionsgerät"
* EAN
* Voltage
* VPE

I have added a select with the following Code in the TCA.

...
'columns' => array(
	    'category' => array(
            'exclude' => 1,     
            'label'   => 'Category',
            'config' => array(
                'type' => 'select',
                'minitems' => 1,
                'maxitems' => 1,
                'foreign_table' => 'tx_jrcatalog_domain_model_category',
            )
        ),
...

How can I switch parts of the form depending on the category? I have
absolutely no idea. I have studied examples like blog_example, sjr_offers
and kiddog_news but there isn't any way of that. 

Thanks for any help!