How do you attract gray tree frogs?

I think they to attract them is by having a kiddie pool in your backyard or in the woods they usually live in woods or in little ponds by the woods. If your using a kiddie pool like me i would dig a hole the size of the pool and put it in there then put pond water in it the reason why you have to dig a hole is because some frogs wont be able to get in there attracted a frog in there and its a green or bronze frog i caught it on July 27 2012 it was sitting on a rock half on half off like gray tree frogs laying there eggs but i don't know how green or bronze frogs mate or lay eggs i put it in my frog tank with 4 other fire belly toads for a other question someone asked can a frog or toad lay its eggs with no mate i answerd that one 2. Just be careful when you put water in your kiddie pool in the woods mosquitoes will go there and to attrack frogs to lay eggs put leaves in the pool and they will soon float to the bottom and tadpoles will eat them but do not put tap water in itl when you have tadpoles in it i killed all all the ones in it sadly on July 28. Sorry 4 any typos