Hi,
 On my form I have one field of "City", and this in turn needs to
effect "Township". When township is selected, the next field is
distance, and for every 'township' there are 2 distances available to
pick. (i.e. Washington brings townships 1-5, then township #1 has
distances of  23Miles or 36Miles).  How do I:

1) Make sure when a city is selected, only the townships in that city
show up in the next drop down box.

2) Once a township is selected, there are basically 2 options in the
next drop down box that should show up.

What's the best way to do this?

Thanks much!!