Drop down list contents search

[Humphrey]

I use a site search engine from Freefind.com which works very well but does not deliver results from the contents of my drop down lists which I use extensively on my www.lakesandcumbria.com website.

Is there a site search engine available (preferably free) which will search my site including all the drop down lists and deliver results to my visitors?

Example page from my website which includes a drop down list
http://www.lakesandcumbria.com/view/maps/index.htm

[Humphrey]

The Freefind search engine I use comes into use only when visitors arrive at my website and want to find a specific topic on this website only (not the entire Internet)