inongimke on "[Plugin: Contact Form 7] Repeated Submissions from Multiple Clicking of Submit Button"

I made that change, but I don't think that's going to be enough. The site is for children 6-14 years old. They will be some who click too much.

Is it possible to add something that will only allow the form to be submitted once? It only sends it the first time the button is clicked?

I found a lot of stack overflow writing on it, but I don't know how I would add something like that to Contact Form 7. I don't want to go in there just dropping in javascript, because I don't know how it will interact with what you have.

http://stackoverflow.com/questions/926816/how-to-prevent-multiple-form-submit-from-client-side

Or is it safe to add the multiclick plugin I found? http://wordpress.org/plugins/stop-cf7-multiclick/