This code works in my site in IE, but not in FireFox, and I'm stuck as to why! Any ideas? (The image paths are correct, I've tested these.)

Code:
<script language="javascript" type="text/javascript">

<!--

var strBGCol = "#ADCED7";

document.write("<table border='0' width='100%' cellpadding='0' cellspacing='0'>");
document.write("<tr>");
...