Thanks for the help Cathi, but I finally got it to work. I think my VBScript was messed up which is very possible since I have never written any before. I changed it to

		<script language="vbscript">
		Sub ValidateTxt(sender, args)
			strValue = args.Value
		    args.IsValid = true

			If Not IsNumeric(strValue) Then
				args.IsValid = false
			End If
		End Sub
		</script>

As soon as I come into the page. If I take out the client side validation, the web page works fine, but when I include the client side VBScript I get the error.