Re : navigation for popup in can.route

here is my project flow

first load the home page.in home page when i click link then popup open.i select any option in popup then will go to other pages based on the option selected.i can navigate the pages to front including popup using can.route.but moving back before home page the popup must must show.but the popup didn't. pls help me how can when moving back how can i show the popup before home page