Client-side Programming Overview
RadSwitch provides a flexible client-side API. You can easily interact with the switch in the browser using the RadSwitch client-side object. In addition to a variety of client-side events, the client-side object model lets you achieve complicated tasks while avoiding unnecessary post-backs.
Getting the RadSwitch client-side object
RadSwitch creates a client-side object with the ClientID of the button. You can obtain the reference using the following JavaScript code:
var switchObj = $find("<%= RadSwitch1.ClientID %>");
or
var switchObj = $telerik.findswitch("<%= RadSwitch1.ClientID %>");