Gestalt.
Here is how I manage to pass arguments to a 'click event' handler,
assuming you have a button whith an id equal to 'Button1'
<script type="text/python"> import System from System import EventHandler class Person(object): def __init__(self, name): self.name = name self.greeted = False def GreetHandler(p): def SayHello(s,e): if not p.greeted: window.Alert("Hello " + p.name) else: window.Alert("Happy to see you again " + p.name) p.greeted = not p.greeted return SayHello p = Person("PAUL") document.Button1.AttachEvent('onclick',EventHandler(GreetHandler(p))) </script>