Complex HTML test page

For testing a JS I'm looking for an HTML test page. It should have complex elements like forms, IFrames, scroll boxes inside scroll boxes, links to other pages, some CSS magic, etc. on it. Are you aware of anything like that?

I already found these: - http://ift.tt/2k3K12h - http://ift.tt/2iEsO38 - http://ift.tt/12EsrId

However they're all not complex enough.