Web Objects - open in same window/tab?

We are creating a series of e-learning modules that will be presented on our Joomla site. Each module is preceded by a form (created with a Joomla extension) to collect user info. The form links over to the Storyline module. When the user is finished they fill out a feedback form (using the same form software).

I have created a test module that uses a web object to go to the feedback form. The problem is that if I embed the form in the Storyline frame, it displays the whole web page - menus, headers, footers, everything.

I don't know if a way to pull in the form without bringing the whole page with it, other than perhaps creating a separate template just for the form, which is beyond my skills. I can embed the form in a webpage using the extension's shortcode, but that doesn't seem to be an option for the web object (which requires a URL).

An alternative is to have the web object (form) open externally (not inside the Storyline frame), but this defaults to opening a new window (not even just a new tab) which I'd rather not do either.

Is there a way to get the web object to open in the same page? It's probably the best option, given the limitations.

Thanks in advance for the help. :)

Wendy