I've seen the other topics and fixes for the sub-menu problem in Display but mine is slightly different in that it works in IE but not Chrome or Firefox.
Website is http://www.hertspremiumwebsites.co.uk/BMW and the drop down menu is on the 'Doors' link in the main top navigation.
The sub-menu displays fine but disappears as soon as you try to select a link.
I would really appreciate some help to resolve this.
Thanks in advance.