Topic: Transparency problem with HTML

I would like to position the viewer so it sits on top of the HTML text of a page.  The example provided doesn't work ... the viewer is under the text, not on top of it.  Is what I am asking even possible?  If so what is the HTML code and if you also have a quick way that I can then turn it on/off based on the user clicking on an HTML link.

Thank you in advance,