Im getting a code error saying "mismatched braces" and now none of my 50 buttons work. Can someone look at my file? And also, is there a way to change all the on click functions to mouseover without redoing all the buttons? Also, the file is covering area

Im getting a code error saying "mismatched braces" and now none of my 50 buttons work. Can someone look at my file? And also, is there a way to change all the on click functions to mouseover without redoing all the buttons? Also, the file is covering areas of the page it is to reside on. I can send a link to that:http://ehn.ehstest.org/ehs/news/2014/jul/birdmap/birdmap-test