Very useful, thanks for the info Martin.
How would you do this with an icon?
That is click on an icon and open the iframe.

Steve

My client is keen on the chevron arrows but they mess up things due to the Z index problems. I know things have been put off till the next major release. Is there anyone out there that would be able to have a go at fixing the problem. I don't need a preview image but a tooltip would be good but not ...