536235 Need State/Countries Added To My website

If you look at my website driveforbucks(dot)com on the left hand side i have all the states in florida listed. I can add/remove from admin section but I want it to list all the countries on the left hand side and then when they click on the country is list all the staes within that country, needs to be where loads with out the page reloading. It should function with the links still as it does now going to that section. In the post a gig section they would normally have a drop down to select the category (location) i will need there now to be two drop downs, one selecting the country then the second loading to select the state.