.  I try to always test what I write before posting it. I wrote it and originally tested only in Opera, but, based on your question, I've now gone back to test Internet Explorer, Firefox, and Safari. It works in all of them. What browser do you have that can't handle it?  He did not say that the browser could not handle it. His point is that the code is totally redundant as there is no modern browser that does not support document.getElementById(). That suggests that the code is rather old. I would have thought that a professor seeking to give "excellent responses" would know that"  