I've search them all up for a 1000 times. Now I'm going to write them down as reference. This post will grow in the next few months.
Remember do not forget to set the behaviorId of the control.
References:
**CollapsiblePanelExtender
**Expand:
- $find('BehaviorId')._doOpen();
Collapse:
-
$find('BehaviorId')._doClose();
-
$find('BehaviorId').collapsePanel();
**ModalPopupExtender
**Show popup:
- $find('BehaviorId').show();
Hide popup:
- $find('BehaviorId').hide();