Originally Posted by Arevos

I can access the site.

Your site appears to be AJAX, using XMLHttpRequest. Perhaps you could construct a form that would send data normally to your application through standard CGI, and then use javascript to "override" the form. Perhaps this would be as easy as adding in an onClick event, or perhaps the POST address of the form would need to be changed. Regardless, javascript can easily edit the DOM of a page.

So, you could have a normal CGI application for those without Javascript, and a fancy AJAX application for those with it.