At a first glance, I can see that on your calling code:
<div class="icons"> <a href="#" onmouseover="SwapOut(personal, 0)" onmouseout="SwapBack(personal, 1)"><img name="personal" alt="logo" src="images/personal_up.png" /></a>.... </div>
you are referencing undefined variables. Have you tried to replace the call for:
onmouseover="SwapOut(personal, 0)"
with
onmouseover="SwapOut('personal', 0)"
as I guess you want to address the object with name 'personal' instead the object contained in personal variable.
Hope this helps.
You keep going, have a Nice day!
Henry.
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