Conditionnal dropdown lists - by: La_civette

Hi folks,

Using LS for a while but always pushing it further according my needs. I really love the toolset.

I came to a double issue recently. I search the forum without finding any sure clue.

1. Is it possible to have a drop down list modified on the fly according a previous YES/No question in same group ?
If yes, options are 0,1,2,3,4,5,6,7,8,9
If no, options are 0,1

2. Is it possible to have 2 dropdown lists conditioned by each other list in same group
If Q1 is 1 then Q2 has to be 0
If Q2 is 1 then Q1 has to be 0

I believe solution is at javascript level but am not sure.

Thank you beforehand,