For Validation you can use specified class name for example for email field use the
class “email” in eclipse then it will automatically validate.
second method is for some fields inculding email we can use the Regex validation . in
eclipse we will get one field adding option for regex. enter the apropriate regex in the
box
Third method is using verification script. in verification script we can add the validation
using php code and it can be displayed into the settings variable as an error message.