Expand/Collapse not working

http://www.360institute.com/my360/student-support/pc-requirements-materials-included/included-materials/

Been reading through these boards and cannot find the solution. As you can see from the link above it simply won’t expand and collapse. I have no idea why its so hard. Help please?

http://ww.wp.xz.cn/plugins/jquery-collapse-o-matic/