Add this bookmarklet to your browser. Activate the bookmarklet and as you tab through the site you should see a red border around whatever gets focus

Focus Bookmarklet

javascript:(function(){var%20ua=navigator.userAgent.toLowerCase(),ie=ua.indexOf(%22msie%22)!=-1?ua.substr(ie+5,1):0,outlineProp=ie%3C8?%22border%22:%22outline%22,activeItem;function%20styleFocus(e){if(activeItem){activeItem.style[outlineProp]=%22%22;}activeItem=e.target||e.srcElement;if(activeItem){activeItem.style[outlineProp]=%22solid%202px%20red%22;}}if(document.addEventListener){document.addEventListener(%22focus%22,styleFocus,true);}else{document.attachEvent(%22onfocusin%22,styleFocus);}}());