After looking at your source code, the first thing I notice is you include 2 different versions of jQuery on the same page. Version 1.8.3 is included in the <head> of your page and 1.7.2 is included later in the <body> tag. Generally 2 includes of jQuery will break any scripts that use jQuery.
I'd try removing one of the jQuery includes (which one may depend on what scripts are using jQuery and which version they require).
"Given billions of tries, could a spilled bottle of ink ever fall into the words of Shakespeare?"