>I just tried this in both IE 11 and latest Chrome and in both cases the form was not submitted with 2 textboxes.

This is from the basic support. So, maybe in the way the Html page is generated that it will allow to support the Enter key to post or not. I ended up discovering that about the other issue I had. This is why I always add that support myself so it will always work. And, I needed that to work as well if there is no submit button. Sometimes, if no submit button is present, the Enter key will not post. With the event I am adding, this takes care of it. I am pretty sure if I change the html div control to an ASP.NET div control that this will work. That might be a workaround for now.