Rollover is not clickable in IE but is in FF

[Dopple]

I'm assuming this is to do with my CSS.
I have a horspot for the navbar (Purple box) at www.ufreak.net/boxoffice.php. This is selectable in Firefox but in IE it's not. This image is absolutely positioned so I'm not sure if this makes a difference?

I'm using <img id="menubg" src="img/menubg.png" usemap="recordings" alt="">

and the style for #menubg is
#menubg {
position:absolute;
z-index:0;
top:75px;
left:0px;
}

Any ideas as to what could be causing this?

[Centauri]

Assuming you are talkin about IE6, then replacing the menubg png image with a jpg image would probably solve the issue - this is a common issue with the alpha loader program used to handle png images in IE6.

Cheers
Graeme

[WebJoel]

Actually, I am a little surprisaed that it works in Firefox, as only IE understands 'negative' z-index (and not sure about whether "0" is okay or not)...
And, I avoid *png. Not worth my trouble (see above). :)

[Dopple]

Yeah thanks. That has sorted it.
I was using pngs becasue I'm a lazy bum. My designer sent me the images as png format and I couldn't be bothered changing them. As I recall I had the flu at the time so that's my excuse!
Thanks again for your help.