This is really frustrating me.

I have a webpage www.teak.com/les/wholeproduct.htm that works perfectly in IE9, mozilla, chrome and opera but comes out with an error in IE7/8 of Line: 596 Error: Object expected.
It was working perfectly when it had tabbed panels, menus, highslide and cookies but as soon as I merged in spryslidingpanels it broke. (I had sliding panels working on its own so the theory/coding was OK).

I have tried various debugging tools and inspectors but I am lost. Can anyone help??

I am using DW CS5.5.
cheers