The DOCTYPE must be the absolutely first thing on the page. You have:
The favicon link tag belongs in the head, after the title.
<link href="images/favicon.ico" rel="shortcut icon">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
In an unrelated matter, you also have a call in your body tag to:
and a number of calls from link (<a>) tags to:
None of these functions appear to actually be available to the page.
Edit: BTW - Those are some very nice custom buttons!