Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Can you hang this on a shower door?
Document: Works great hanging from a shower curtain or even a door frame, great value too. I no longer have clothing draped throughout the house while it dries.
This sweater dryer is really what I was looking for. The only problem I have is the hanger for over the door isn't quite big enough, and now that I have it jammed onto the top of the door I wish it was flat so I could close my closet door with the hanger on it.
I wear small and medium sweaters...this is the PERFECT size for them.I hang it in the shower where it is out of the way and works great!
The item arrived promptly and it is  just as described. I like it because you can have more then one sweater drying at the same time and it can hang on the shower curtain rod.
Much better than the flat sweater dryers. This folds down into a small oval for easy storage. Easy to hang on a shower curtain rod.
I purchased this dryer as Christmas gifts. It  seems like a great idea to be able to hang this dryer on the shower rod out of the way.
I can hang it nearly anywhere not just the shower rod, it holds 3 normal sized items, and once I got the hang of it- it folds up flat for easy storage! Perfect!
I've been looking for something like this to dryer sweaters that need to lay flat.It's perfect. Folds up nice and small. Hang it on your shower rod.I wish I'd invented it. So simple.
I did not like this product because it was difficult to spread sweaters flat and around hangers. Not wide enough for my sweaters. I am short so it was difficult to hang hanger on my shower rod. Would not buy this hanger again.
I love this item, it is perfect for drying several bulkyor regular sweaters, just hang on the shower curtain rod. it folds down flat and I store it behind my laundry hamper. It is a good size, and lightweight
Answer: The s-hooks supplies go from the ribbon hanger to over the round rod at the top of the shower.  I think most shower door installations have square track at the top so it is unlikely to fit.  Also the "shelves" that hold the sweaters may be too wide/long to fit in the door opening where they would have to hang.  If it did fit then maybe an over the door type hook could be substituted for the s-hook.