create form that can filter - Joomla! Forum - community, help and support

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dear,
i want create form can choose section inside section, example :
-- have 4 training program
-- inside each program 5 different courses

now want form allow client choose training program want drop down menu, after step second field show him courses
form.jpg
belong training program .

is there way in joomla self, or form module can

thank advice.

form.jpg






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