Pages does not open in IE8

Pages does not open in IE8

I have trouble opening my pages in IE 8. some pages in my site like this

http://www.egtours.com/10_days_nepal_trip.php

In this page I have used plugins for lightbox, and drop down menu. Lightbox has jquery 1.2.7 and drop down menu has jquery 1.2.3

I am wondering is that because of these or other reasons above page could not display in IE 8.  is it jQuery conflicts ?