The genus Hyla is one of approximately 38 genera in the New World family of tree frogs (Hylidae). The word Hyla translates to "tree," and Tree Frogs are indeed arboreal. They have a very broad distribution; species can be found in Europe, Asia, Africa, and across the Americas.
There were more than 300 described species in this genus, but after a major revision of the Hylidae family most of these have been moved to new genera so the genus now only contains 33 species".
Source: en.wikipedia.org/wiki/Hyla - 25.10.2010
In contrast to the European Tree Frog this animal has no dark stripes on the side.