OK, I just went to the home page found at the link provided in post #7; which, while it is similar in format to the images in CPRich's post above, it doesn't morph the State and Country fields, but instead has two long fields neither of which have labels, both only the little search magnifying glass on the right. Both fields do list look ups of destinations based on ones input.
I don't like that one at all as the two identical search fields are confusing and the date fields are a bit quirky too as the arrows that bring up the calendar cover up the next field. Weird. It looks like a java page I might have constructed in my intermediate java course, before the instructor showed me how to do it correctly. LOL
All of the above is on FF 20.0.1.