# Client-Side

## Events

* **OnClientNodeChecking:** This event event fires prior to selecting a checkbox in **RadTreeView**. The function has a single parameter, the instance of the checked Node. This event can be used to prevent the Node from being checked.

* **OnClientNodeChecked:** This event is fired immediately after **OnClientNodeChecking** event, the only difference is that the checked status of the Node is changed to reflect the new value and the action **cannot** be cancelled.

## Methods

* **get_checked()**: This function returns **True** if the Node is **checked** and **False** if the Node is not **checked**

* **get_parent()**: Returns the parent Node of a child Node

* **set_checked(true/false):** Checks or un-checks a given Node

* **get_checkElement():** Returns the HTML element that corresponds to the checkbox of the Node

For more information, see [Client-Side Programming](https://www.telerik.com/products/aspnet-ajax/documentation/controls/treeview/client-side-programming/overview).

## See Also

* [Overview](https://www.telerik.com/products/aspnet-ajax/documentation/controls/treeview/client-side-programming/events/overview)

* [RadTreeNode](https://www.telerik.com/products/aspnet-ajax/documentation/controls/treeview/client-side-programming/objects/radtreenode)