Hide/Show right column content via mouse over or clickable button?

Hello, I am currently running WordPress 2.8.4, and everything is now working as expected (after kicking SuperCache to the curb, finally), but there is a website layout feature I would really like to setup on the website…

If you go to https://www.vbseo.com/ you will see something similar to what I am shooting for (minus the transparency). I want the site setup so that the side column (seen at https://document-solutions.biz/wpindex.php ) is not displayed by default when the page loads and is instead only seen when the reader mouses-over, or clicks, the tab/link that enables the column to slide into view. Then, to hide the column, just have it slide back when the mouseover moves away from the column OR slide out of view when the reader clicks the same link used to show it. Either method (click/toggle or mouseover/mouseout) would be fine for showing/hiding the right column.

Is there a plugin out there that already does something similar to this? I searched for hours today and could not find anything close.

Any suggestions or links to code/scripts/etc would be GREATLY appreciated!

Thanks!