$$$ I buy: script to send automatic message in form of websites

Hello friends, I wonder if there is a script to send automatic messages to form sites.
I am launching a site rent and would like to send forms to visit our site competitors website.
Example, this site "greatrentals" has a form to contact the owners and need to fill only once, when a second owner to submit the form is completed by simply click "send."
Etam the script should just automatically trigger the submit button.
Does anyone know of anything that serves for this purpose?
health

if anyone have a doubt I'm online and I can better explain
[friends, sorry for my bad English]