MULTIPLE SELECT LINK for Open-realty Script

MULTIPLE SELECT LINK 2 or 3 or 4 level for search page for 2.3.5 version of open-realty Script ( [login to view URL] ) With this system it is possible to create fields connected select among them. The fields are created and they manage him as the other of open realty. Is possible to use only one multiple select to 2 or 3 or unlimited levels. Example: Country >> State >> Region >> City or City >> Common >> District or Manufacturing >> Model >> Version (for sale automobiles) excuse me I can't write english very well