Page not loading in IE6

Hi there!

I was developing my page today and stuck with this strange problem: The page loads normal with Firefox, but I  just see a blank page with Internet Explorer! o_O

http://www.e-webtour.com.br/sistema/novo/php/208000/208000.php

As you can see, the source code is all there... =/

I've found the problem... it's the include of javascripts files... but why that happens?

<script type="text/javascript" src="../../js/funcoes.js" />
<script type="text/javascript" src="../../js/menu_lateral.js" />

The path to the files is right... o.ô

Don't know. It's a Javascript problem.