I have the following problem: I have a web form which contains ajax accordion. Each accordion pane contains a usercontrol. Each usercontrol consists of several textboxes and 2 buttons. All the textboxes and 2 buttons (inside these usercontrols) are wrapped in the UpdatePanel. Following updatepanels is the UpdatePanelAnimationExtender for some animation whithin each usercontrol. Each UpdatePanelAnimationExtender has a different animation id from other usercontrols.