Joomla website ie6 and 7 optimisation

This project involves optimising part of a Joomla website so it looks and works the same in Internet Explorer 6 and 7. If you take a look at this page... [login to view URL] the image gallery at the top does not work in Internet Explorer 6 or 7. Instead of showing the new picture an empty box is displayed. This website uses advance php and coding, so only bid on this if you are confident you can fully deliver the project. Give me your best price for this as more projects will follow. I have a very short deadline for this so it needs to be done as soon as possible.