DHTML Hierarchical Popup Menus from webreference.com - need help

Has anyone heard of the DHTML Hierarchical Popup Menus from webreference.com? It's an online tool that creates pull-down menus for you, and I happened to try to make a menu for my site. The online tool is located here: http://www.webreference.com/dhtml/dynomat/hiermenus3/ie/ . If anyone has any experience with it, please read on.

After what seemed to be long hours, I finally came to the last step of configuring the menu to work on my site, until I hit a snag . It's a javascript error that I can't figure out. The error is as follows:

Line: 8
Char: 3
Error: 'isMenu' is undefined
Code: 0

It's at my site (which has the error) here: http://www.redrival.com/digitalfx/newmain.html . The text MENU is the link that is supposed to be for the menu. The error occurs in this coding in the html of the document:

<SCRIPT LANGUAGE="JavaScript1.2">
<!--
if (isMenu) {
document.write("<SCRIPT LANGUAGE='JavaScript1.2' SRC='hierArrays.js'><\/SCRIPT>");
document.write("<SCRIPT LANGUAGE='JavaScript1.2' SRC='hierMenus.js'><\/SCRIPT>");
}
//-->
</SCRIPT>

BTW, the <\/SCRIPT> is supposed to be like that.. what with those \/. So if someone knows the solution to this javascript problem, please tell me it... before I go crazy !! You can also email me the solution at [email protected] .

Thanks, Sabrina

P.S. I've noticed that when I actually click on the MENU link, 2 new javascript errors appear... boy, that's all I needed...