I am not an expert by any means, but at a first glance, you are reserving extra space with var j, when you could use parameter x directly.

You need to return your output; returning the value means the value is retained from that function call. The value retained can be checked and checked for equality against the expected answer. You are attempting to modify to the HTML on the page, which can only be check locally, not globally.

All katas on this website work like this.

I solved this in a manner that is not how I would actually do it, due to my life.

Hey, I am really conservative and am wondering if you guys know of any type of specific reason
somebody shouldn't program. I studied economics at UO and have taken a few programming courses here and there.
I have done a little bit with Content Management Systems.

I am not malicious and would like some logical advice on what can and shouldn't be done other than the obvious.
I appreciate it.

What do you think about my solution? I appreciate your feedback.

This is how I was going to do it originally with keys, probably would have been a better solution.