Mandatory Field

Hi,

I have a dropdownlistbox on my screen and a button. Some processing is performed on the click of this button. But I also want to make sure that the user has selected some value from the dropdownlistbox otherwise an error message is displayed to the user. How do I achieve this?

For Inputfields I can say REQUIRED= "TRUE". But what do I do for the dropdownlistbox?

Regards

Tejaswini