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Client-side Programming Overview
RadCheckBoxList provides a flexible client-side API. You can easily interact with the checkbox in the browser using the RadCheckBoxList 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 RadCheckBoxList client-side object
RadCheckBoxList creates a client-side object with the ClientID of the button. You can obtain the reference using the following JavaScript code:
JavaScript
var checkBoxList = $find("<%= RadCheckBoxList1.ClientID %>");
or
JavaScript
var checkBoxList = $telerik.findCheckBoxList("<%= RadCheckBoxList1.ClientID %>");