225845 modal window submit field

I have a form that opens a modal iframe window where info about a restaurant is asked. We'd like that the name of the restaurant is added to a dropdown with restaurant's names on the child window that opened the popup. I would like that when we click on “Suggest New Venue” a modal window popup is shown, where we ask for the name of the venue, city, state, description and so on. Right now, we have the modal window, but we want that when the venue has been added, the name of the restaurant will be added to the dropdown “Restaurant” on the form below. Right now, this is not done, so the user does not see the restaurant added on that form. We need that the modal window does not scroll when the browser has the scrolling bars. The form is already done and the modal window as well, but with the scrolling problem, we just need to add these 2 features, which we'll reuse in a couple of places on our site. Take a look at the doc i attached for the graphic. I would need to see a sample test that you make on your site, a link opening a popup, adding data on popup and the results being added to dropdown on parent window. Let me know if you can do this. I would need the code for this so that my coder can replicate this. He's not that good on javascript.