Script Error and Total Not Showing in IE 8

I've created 10 complex forms using Conditional Logic and Pricing fields.

Everything has seemed to go fine until recently, I keep getting a pop-up Script Error in IE 8 and when the client finalizes and is ready to check out, the Sub Total says $0 in IE 8 (it's fine in Firefox).

It's also seeming to take quite a while to load.

Here's one of the forms:

http://monetizemyhobby.com/dance-america-nationals-2011/register-solo-duo-trio-2011/

Thanks!

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Found this too:

Put Scripts at the Bottom
tag: javascript

The problem caused by scripts is that they block parallel downloads. The HTTP/1.1 specification suggests that browsers download no more than two components in parallel per hostname. If you serve your images from multiple hostnames, you can get more than two downloads to occur in parallel. While a script is downloading, however, the browser won't start any other downloads, even on different hostnames.

In some situations it's not easy to move scripts to the bottom. If, for example, the script uses document.write to insert part of the page's content, it can't be moved lower in the page. There might also be scoping issues. In many cases, there are ways to workaround these situations.

An alternative suggestion that often comes up is to use deferred scripts. The DEFER attribute indicates that the script does not contain document.write, and is a clue to browsers that they can continue rendering. Unfortunately, Firefox doesn't support the DEFER attribute. In Internet Explorer, the script may be deferred, but not as much as desired. If a script can be deferred, it can also be moved to the bottom of the page. That will make your web pages load faster.

from: developer.yahoo.com

Not sure this is helpful or not...