where can i add a global custom email variable

[eVelt]

I need to create a form and one of the fields is "Email" which I would like to populate if logged in with the customers email address.

the contact us page does it but there is no global variable to call the customers email address something like this

$_SESSION['customers_email_address'] 

where can I set it, and where is the others defined (like 'customer_first_name')

[twitchtoo]

You need to add:

$_SESSION['customers_email_address']  = $check_customer->fields['customers_email_address'];

in the file:
includes/modules/pages/login/header_php.php

as the $check_customers_query is already looking up the value :)