Code Alerting An Undefined Message?

I'm poking around with objects and the differences of creating a variable outside an object and inside an object. Here's my code.This is just before the closing body tag:

Code JavaScript:
<script type="text/javascript">
// Creating an object[code]....

When i reload the page, i get an alert box stating the 1st message "Hello there" When i click on OK on the alert prompt. I get another prompt that says Undefined. I tried experimenting and found out that if i call the another() function within myObj without alerting it like so:

Code JavaScript:
myObj.another();

Then i just get an alert prompt with "Hello there" only...the second undefined message doesn't appear.