This is the 2nd time my White's tree frog has escaped. This time I did not panic. After pulling all the furniture out and searching with a flashlight, I waited. The 2nd day I knew he would be getting a little dehydrated so I set three bowls of water around the room and put the critter keeper with crickets inside on the floor by the biggest water bowl. I waited till dark when I usually hear him call and I let out a "yip". While he didn't answer back I did see him perched on a table eyeballing the crickets and the water bowl.
When I put the frog back in his tank, I discovered the old-fashioned latch will click shut and then release. I have taped the door shut for now until I can change the little fella to a different tank.
This is just an informational post for others who might experience the same problem in the future. Don't give up, the first time I found him in the daytime.