Message confirm in BSP like in Javascript

Hi there,

I would like to know if there is a confirm dialog box défined in BSP/ABAP like in javascript in order to confirm or not the action in a onInputProcessing?

I tried to put a javacscript function with the confirm dialog box in a onclick but the problem, the onInputProcessing is always executed in spite of the answer of the user to the confirm dialog box.

Does anyone have any idea or any advices?

thanks.