Multi Dropdown menus in classic ASP with javascript

I am working on a project and there are 3 level Multi-Level Dropdowns. if i choose one item on the first dropdown list, it will create its own sub menus on the SECOND dropdown, and if i choose one of them, it will display its own items on the THIRD dropdown menu. we can call them Multi-Level Dropdowns. (i think we need java script for displaying 2nd and 3rd level dropdown menus). and later it will display the selected / recorded items in the same Multi-Level Dropdown as SELECTED item.

I need very experienced Classic ASP and Java script programmer.