If we have a ModalPopupExtender with the id ‘modPopup_ModalPopupExtender’, and need to display or hide it in javascript, we can easily do this using the $find() function. Let’s see this in action: ASPX: Javascript: The code is pretty self explanatory...
The CollapsiblePanelExtender is a cool way to convert simple panels to collapsible ones. It usually has a target panel, a control which can make it collapse, another (or the same) control to make it expand etc. Clicking the said controls will trigger...