Event on equals empty field

Hi,
is there a way to toggle an action under the events tab when the value of the field is empty or not?
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I'm reading data from a table and I want that certain fields are displayed (or not) when the content of the field is empty.
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Thanks in advance.
w

Hi walterbz,
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You can hide/show elements using a PHP action to add CSS to them depending on the values; or you could add JavaScript to run after page load. Probably the CSS route is a little easier.
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Bob