Prototype JavaScript working locally in all browsers, but not in IE9 on server

Question

I am using Prototype version 1.6.0.2 in action here:

http://sgm189.csesalford.com/invoices

please login with username 'billy' password 'billy'

Go to Invoices > new invoice. Then try filling numeric data in the fields 'Sales Tax', 'Qty' and 'Price'.

In all browsers but IE9 the fields dynamically refresh and everything works. Another strange symptom is that the code works locally in IE9. UTF-8 encoded and no BOM.

Are there any revisions I can make to my code? Code available here:

http://jsfiddle.net/Fqe5d/

Answer 1

Update your prototype! That should probably fix it :)