Similar callback feature for asp.net 1.0

hi,
i was wondering if there is a similar feature or addition to the callback feature available in asp.net 2.0.
i'm asking this because i want to call a server-side function when an event like onPropertyChange or onChange is triggered.
thankshttp://dotnethero.com/hero/Selectionlists/Callback.aspx?nmx=6_4 I used this in my asp.net 1.1 application.