HydroServer Website: Data query variable selection

pamaishlin[CodePlex]
It would be much preferrable if in the first query drop down box one could select the watershed/region of interest, then have the second dropdown box for variables list only the variables available at that watershed/region. A user not familiar with given
watersheds/regions will not only be inconvenienced by having to look at all of the variables, but will not know if the watershed they are interested in uses a given variable (listed by units as well as variable name).