Script Works In Every Browser Except IE?

I have a series of web pages that enable communication with a MySQL database. The pages all work fine and mostly everything is just the way I want it.As many people do, I put JavaScript on the client side pages to check input before sending to the server. The scripts check for blank fields, non-numbers where there should be numbers, etc. I know from personal experience that the scripts work in Safari, Firefox, SeaMonkey, and others. The scripts do NOT work in IE! No matter what is entered in the boxes, IE says they are not numbers!In order to solve this problem, I wrote a much smaller script and purposely did not use the isNaN() function. I thought this would fix the problem but it did not. To see what I've done and try it in IE (any version) or any other browser,ej2ffej2.nfshost.com/checkNumbers/test.htmlIf someone can examine my JavaScript and tell me why this happens the way it does, that would be terrific. If someone has another idea of how to fix this, I would love to hear it.