Change dynamic button label

Hi,
In apex 3.0 can I have a button which changes dynamic? e.g. if an item is null then the button label to be 'tes' else button label 'ok'?
Thank you

Hi,
Maybe easiest way is create 2 buttons and set condition for those.
Use condition when item in expression 1 value is / value is not in expression 2
Regards,
Jari
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