Ajax browser issue

website: (PM me for the link) we have some browser issues with this website. when using IE 9.0.8+ the main search feature does not appear on the site at all. i believe it was poorly scripted by previous coder.. Browser has to be in compatiblity mode for users to see the search box. ajax drop down suggestion system for actors on this page is working for some and not for others. and completely not working for IE latest version. (PM me for the link) we like our website to be compatible with all the main browsers. I am looking for a very skilled php coder. Please dont make bids, if u are not very skilled in php.