This very simple sample code creates a unique email address by appending the epoch timestamp to it. This is a useful technique for testing registration sites that need a unique email address provided each run.
logonId = "gomeztest_" + new Date().getTime() + "@gomeztest.com";
The code is used with the control window as the target... and then
`logonId` (note the backtick marks) can be used in a FormFill action later where the email entry is done.