Sure. Many of us
can create such thing. But none will. Let's see why:
0) There is no such thing as "java script", just Javascript — which has little to do with java.
1) You can't make any GUI just with Javascript. Even if you don't add any static HTML markrup to your page, you still need HTML. So "OR" mаkеs no sense.
2) In general you can't make such an inventory just with Javascript and HTML. Since you would loose any data you enter as soon as you close your browser. So you need some storage.
3) I wrote "in general" since in HTML5 you have
locladb[
^]. But as it is local, the data entered on one client remains on that client. So you can't make any multi-user application this way.
4) And as soon as you need to upload data to a server, you need a server, a storage (like database server application with a database having a proper schema) and a server side custom application that handles anything about interfacing between the client and the storage - and many other things. A "website creator" is rarely suitable for such thing. You need to code!
5) At least you could have told us what are the capabilities of your website hothing server, like: what database engine you have there, what kind pf application can you run there (PHP, ASP, ASP.NET, Python, Ruby, NodeJS,…) and many other things needed to develop the server side.
So, what you requested can not't be made. But even if it could be, no one would here, because things don't work like this here. We are willing to help if you ask for help — but you want somebody to do your work. Well, we rather won't…