Gets the value of a cookie stored by the panel object, as a number. This can also be done with cookie.GetNumber, using the panel's cookie name, a fullstop, and then the actual name of the cookie.
1 string cookieName
The name of the cookie from which to retrieve the value.
2 number default
The default value to return if the cookie does not exist.
The number value of the stored cookie, or the default value should the cookie not exist.