Create a function to transfer data from one form to 5 others

Create a function to transfer data from one form to 5 others

First, I apologize if this gets posted twice. When I tried the first time, the post appeared to just disappear.
 
I am new to Zoho Creator, and I love the flexibility of the program. Most of the tutorials have been very useful, but I do not understand the instructions for creating a new function.
 
Here's what I'm trying to achieve:
 
I have a web page with 5 tabs on it. Inside each tab is an iFrame containing a zoho creator form. Up above the tabs is a 6th form that has just one input field. I want my users to be able to put a value into that single field, and have that value transferred to the other 5 fields so that they can grab the appropriate records.
 
My questions:
 
1) How do I create a function that will turn that value into a global variable that's accessible to all 5 forms?
2) How to I push (or pull) that variable into each form?
 
Thank you in advance for your help!
Reggie