Example 6
Test-Form:
This form is using a callback function for checking the "value 2" field. In a javascript function the value is multiplied with the value of the "value 1" field. If the result is greater than 10 the field is valid.
Value 1:
//--- Only digits allowed
Value 2:
//--- field is valid if the value multiplied with the value 1 is greater than 10