Ajax/Php drop down menu

Hi, I need a menu in Ajax/PHP that have the same functions of the search menu in [login to view URL] (without IP recognition) I have the DB with the routes, when you open the page you have all the origin airport and origin country. After, the ability to filter by Country the Origin. When selected the Origin only the available destinations airport and country must be available. Same filter ability for destinations. When the page is loaded the script must be cached for 15 days (I should be able to set it). I'll give "mock db" for test. I'll paid only after I've tested and installed the script, if you're not ok with this please don't bid. I need more Ajax/PHP development in the future, hopefully we can start a long partnership.