Expanding posts inline

I’m looking for a way to use the ‘more’ tag as I’ve seen it elsewhere…where the post expands in the same window (without going to the permalink page) BUT…I want to do it numerous times in the same post. Similar to how MS Office Help will expand definitions of terms within a single ‘help’ page.

I would be using it to hide images, paragraphs, etc. below the fold…until a user clicked the link. Then it would expand to show what was hidden and contract again with the link was clicked.

Any idears?