[jQuery] TableSorter plugin is not working in IE7

[jQuery] TableSorter plugin is not working in IE7


Hi!
Kindly visit following link:
http://vibersol.com/sitesdemo/shipping/admin/continent.php
Table sorter plugin works fine in FireFox, but in IE7 this plugin
doesn't work. Can some one guide me where and how to rectify this
problem in my code, so that plugin begin to work in IE7.
Thanks in advance