I want to create a drop down menu with multiple drop down options -

i want create drop down menu multiple drop down options. form looking this. county-->state-->city-->place

description:

1. in form there 4 drop downs
2. when user select first 1 (country) other drop downs acting simultaneously. when user not select first 1 other drop downs disabled.
3. when user select second 1 remaining drop downs acting simultaneously. when user not select second 1 remaining drop downs disabled.
4. when user select third 1 last drop down acting simultaneously. when user not select third 1 last drop down disabled.
5. finally select last 1 option , click button

then there display of place attribute details that.

example:
select country(after selection)
select state(after selection)
select city(after selection)
select place(after selection)
after selection display data place.

what have tried till now? language have used or want use? if website, using cms? if yes, one? provide details , codes have tried.