Tj dispatch api

Note the changes to the existing Dispatch test script. It used multiple tags. I don't know if this test was valid for SimpleDB but for SQL DBs it failed because requesting something with multiple tags is an AND operation, not an OR operation.
I think all these commented-out lines are artifacts of the test page you copied from, and should be deleted (rather than remaining in the source, commented-out).

Also, the regId created doesn't appear to be used anywhere (probably another artifact).