Disable save button after pressing it (after submit)

Hi,

I enabled the save button. When user press the save button, it sometimes take a time until the submitted request is answered. It would be great to disable the save button right after the user clicked at it (preventing another submit).

Is there a easy way (config entry) to archieve this behavior? Or must I code something like mentioned in topic viewtopic.php?f=11&t=21222 ?

Thanks in advance,
Franz