Using same variables across 2 diff field's User Input

Using same variables across 2 diff field's User Input


Hi,
I am trying to generate Unique ID based on the values in 2 fields.
EG:- in the order the same order in form

Field.LName -- Substring --> L_val ="abc"
Field.Phone -- Substring ---> p_val="123"


The substring and other activities happen at USer input , and the value is correctly generated ( so far so good)
I want to  have:
Field.ID = L_Val + P_val ( as the last line of code at Field.Phone --> User Input)

But, it so appears that variables declared and used at Field.LName-->User Input  does not show up at Field.Phone --> User Input . Is there a work around for this ? Please advice


Why i want to use variables (L_val & P_Val)
Sometimes, after entering the name / number for the first time --
the person goes back and makes changes to spelling / num etc
So every change, the val is re-written completely

When i use
FieldID = L_Val
FieldID = FieldID + P_Val ( this appends to existing val, instead of re-writing the complete value)