Sidebar links

Hi.
First post here and new to WP

Im making a site and have collapsible sidebars.
http://www.index.ht
The Theme is an edited NewBasic

I had the sidebars sub menus opening when when clicked and from there you could left click a link to a page.
This was working fine then suddenly stopped working for no reason that i can make out.
Right click and open in another tab works fine
Does anyone know whats gone wrong?
Its driving me around the bend not knowing WP to well

Any help gratefully received