Redirect / Stylize Feedback

I am trying to do a “redirect” for one of my contact forms on a page and for the other form, I want to stylize the feedback so it comes up in a different <div> container. Here is the code I was using in Chrome to do the redirect, it never worked when I put it in the “Additional” area. Thoughts?

on_sent_ok: "location.replace('https://www.randomlyopen.com');"

And, for the CSS / Stylize feedback in a sidebar, I need the feedback to show up in a certain DIV. Any way that I can just wrap this Div? Thanks!