Button OnClick Event Works Great In IE But Not In Safari/FF?

I've spend about 2 days writing this javascript code and it works great in IE only to find out that it does nothing in Safari/FF.

Here is my code:

<script type="text/javascript">function calculate() {
var thetotal = 0;
var silver = 0;
var gold = 0;

[Code]....

Basicly what the script does is using some variables in my form will calculate a total price in real time when you click the "Calculate" button. Works great in IE, but in Firefox/Safari it won't do a thing..