spam prevention on forum se

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
if you can make it so that after 10 replies, they have to either wait 30 seconds before submitting again (or put in a captch, which ever is EASIER for you.

once they wait 30 seconds, (or fill in captcha), they can post fast again.

it has to be time related. for example, if they post 10 replies in 10 hours... it wouldnt make sense to force them to wait (or put in captcha)..

the condition is that, if they post 10 replies in 30 seconds.. then trigger the wait time (or captcha)

Skills required:
HTML, Javascript, MySQL, PHP
About the employer:
Public Clarification Board
Bids are hidden by the project creator. Log in as the employer to view bids or to bid on this project.
You will not be able to bid on this project if you are not qualified in one of the job categories. To see your qualifications click here.