Dual drop down with 1st option being current geolocation

Hello, I'm using JQuery Mobile and Classic ASP to write some smartphone/iPhone pages; I want to create a webpage (called [login to view URL]) with 2 drop down selection form, with the first option of the first box being current location (see attached) - with box boxes having to be selected. I've been referencing the following; [login to view URL] If the "Current Location" is selected, when GO is presses, the the users current location (longitude/latiitude) must be submitted to the asp page ([login to view URL]) that returns the results, which must then be displayed in the Div, called, ShowResults. Best Regards Jamie