I am not sure that what I name it but here is the details of what I want to do:

There will be two or more dropdown lists, suppose first one contains faculty name and the 2nd one is course name. Whenever I will select the faculty from the 1st dropdown, I want the courses of that faculty will show in the 2nd dropdown list. And in 2nd dropdown every course will be different link with subpages and when it will go to the specific link,...