Logo rollovers not working in firefox

Hi

I have customised my tpl_header file in my custom template to try and include some roll over buttons in my header, its not finished as i am just testing it at the moment so excuse the mouse over/out all having the same image.
It seems to be working in IE but not in firefox.
Here is the code,

<!--bof-branding display--> <div id="logoWrapper"> <div id="logo"><a href="http://www.niodonline.co.uk/"><img src="images/logo.jpg" alt="Powered by Zen Cart :: The Art of E-Commerce" title=" Powered by Zen Cart :: The Art of E-Commerce " width="850" height="200" /></a></div> <div id="taglineWrapper"> <!--div id="tagline"--> <a href="index.php?main_page=index&cPath=79" onMouseover="img src='/images/buttonstest.jpg';" onMouseout="img src='/images/buttonstest.jpg';"style="position:relative;TOP:-80px;LEFT:100px;"> <img src="/catalog/images/buttonstest.jpg" name="a"></a> <!--/div--> </div> </div> <br class="clearBoth" /> <!--eof-branding display-->

Any ideas what I'm missing??

Thanks for any help.

Andy

HI,

been playing with it a little more.

i have made it a simple as i can to try and sort out the problem.
I have now inserted this:-

<!--bof-branding display--> <div id="logoWrapper"> <div id="logo"><img src="images/logo.jpg" alt="Powered by Zen Cart :: The Art of E-Commerce" title=" Powered by Zen Cart :: The Art of E-Commerce " width="850" height="200" /></a></div> <div id="taglineWrapper"> <!--div id="tagline"--> <a href="index.php?main_page=index&cPath=79"><img src="/catalog/images/buttonstest.jpg" width="85" height="38" border="0"style="position:relative;BOTTOM:-20px;LEFT:0px;"></a>

  <!--/div-->
            </div>

</div> <br class="clearBoth" /> <!--eof-branding display-->

I displays fine in IE at the bottom of the main image, but in firefox it seems to have a default relative position at the top of the page, so it displays at the there instead of at the bottom.

Your help will be appreciated

Thanks Andy

Sorted.

Just in case anyone else is having this problem

Inserted, "<br class="clearBoth" />" before the changes.

Andy