Thanks Brian,
Yes, I was thinking the same. I did a site some years ago now where I employed the same stategy. My thoughts then were for people who had JavaScript turned off. This time of course I'm thinking specifically about Mobile devices but, as you say, the same solution should work.
At the end of the say the original site was built using drop down menus and now they are asking for mobile use. They will just have to accept a compromise unless there is a drop down menu method that works out there somewhere?
OK many thanks for the replies guys.