I have a page where my visitor fills in his info (url, name, etc). Another form will load in an iframe with the same info filled in (this form is on another site and out of my control).. I need to have this form's submit forced.. Essentially, I will later use this method to build up an easy-to-use submission service.
Most of the sites I'll be posting to do not accept direct form submission, the submission must go via their form page.. so the whole key to this is to "simulate/force" a click on the submit button on their form page.