Contact number field should be in form of Country Code + Contact number and should not accept any other values than contact numbers.  can anyone give me scripts or business rules to enforce the mandatory requirement on both the client and server side...

I have a Variable with 3 choices:1. choice A2. choice B3. choice Cand I have 3 other variables source, ip, port. Now, clear the values of those variableswhenever the choice variable value changes. Anyone help me to do this..

I need to change the delivery time from 1 day to 4 days on catalog item