Login Module - March 98 - by Sylvain HUET
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This module is a simple login module :
it provides a simple authentification system with only one restriction :
two people cannot have the same login at the same time.

It provides 3 entries :
- start : start the login client module
- show : show the interface
- hide : hide the interface

There is 4 events :
-loginChanged : login has changed (param contains the previous login)
-log
-shown : interface has been started
-hidden : interface has been removed

There are 3 zones
-Login : login interface zone (if no zone associated, the interface is a popup window)
-Text : text zone to display the current login
-Button : button to show the interface

Note :
-incorrect login are :
	- login length < 3 and > 20
	- containing characters 
		- [, ]
		- {, } ,(,) if first characters
		- space if first or last character or preceded by another space
		- ascii values <= 31
		- ascii values >= 127 and <= 160