Portfolio grid no longer functioning

http://www.mltcreative.com/b2b-resource-center/

This portfolio grid with the AJAX functionality was working perfectly last I checked – I went to the page (link above) and the entire page was broken and gone haywire – with the footer coming out and trying to place itself into the actual page content. There should be about 9 items displayed on the page – yet it only shows two now? And even weirder is the fact that the wordpress dashboard black header bar was displaying in the actual page content as well?!

please help! thank you in advance!