Read-Only Page Problem. Not Browser Interactive

Hi. I wanted a simple web page with a click-to-toggle background image feature. I found one online which works great, but it has a major flaw. The page is not browser interactive. It seems to be in read-only mode, or something like that.

ie; Links are inactive, embedded video loads but won't play, I can't copy/save embedded images, or highlight and copy page text to my clipboard.

There are 4 files used for this template. html page, css style sheet, jquery.js, and script.js files.
The...

Read-Only Page Problem. Not Browser Interactive

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