ie7 and ie8 compatibility issue

[Dazza30]

Hi could someone please advise me

I have a website pre-pay-as-you-go.co.uk that uses pop up information boxes, currently these boxes are set up to display from top to bottom of the browser window. Recently after doing some testing I discoverd that this wasnt ideal for smaller screen sizes 17" etc

Heres the code on the page





The below code makes ie8, firefox etc display the popup how i want it, see the image below.

Now the below image is how i want it to display




The problem I have is that pages that contain

<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7"/>

Break up display of the new layout, obviously if i remove this everything is ok. But am i right in thinking that would still mean the popup would not display correctly in ie7?

Any help would be gratefully received