I clicked your link, and bring the following fixes for validation errors:
Make sure you use "" around every single attribute value. EX: u1.extreme-dm.com/i.gif" height=1 border=0 width=1 ===> u1.extreme-dm.com/i.gif" height="1" border="0" width="1"
<script language="javascript1.2"> this must be <script type="text/javascript">
<script language="javascript"> same as above.
t0.extreme-dm.com/0.gif?tag=ivtrack&j=n"> encode the & into &