Problem with IE7 when added callback function to plugin...

Problem with IE7 when added callback function to plugin...

I added to one pluggin callback function and it stoped working on IE7 but working on Mozilla can anyone check it out http://www.lifestyletelevision.tv/customScroller.1.2/2/examples/ajax-menu-example.php
Callback name onContentLoaded... Anyone can solve this problem on IE7?