<input id="ctl00_PlaceHolderMain_RadButtonMango_ClientState" name="ctl00_PlaceHolderMain_RadButtonMango_ClientState" type="hidden" value="{"text":"Mango","value":"Mango", "checked":true,"target":"","navigateUrl":"","commandName":"","commandArgument":"","autoPostBack":true,"selectedToggleStateIndex":0,"validationGroup":null,"readOnly":false}" autocomplete="off">

How can we find the value for checked in this case it's true