Accessing checkbox controls in dynamically generated table

On my ASP.Net page (which uses a masterpage), I have a div: <div id="tableHolder"></div> Every 30 seconds, JQuery calls another ASP.Net page: function refreshTable() { $('#tableHolder').load('[login to view URL]' + hv + '&refreshN=' + (refreshN++), function () { and reloads the following example data into #tableHolder: <table id="bookingTable"> <tr> <td><input id="cb1" type="checkbox" name="BookingID1" checked /></td> <td><input id="cb2" type="checkbox" name="BookingID2" checked /></td> <td><input id="cb3" type="checkbox" name="BookingID3" /></td> <td><input id="cb4" type="checkbox" name="BookingID4" /></td> </tr> </table> I have been using [login to view URL] to access the state of checkboxes but I want to use FindControl instead but cannot find the checkboxes. I have tried a number of examples on Google like this: For Each ctrl As Control In [login to view URL] If TypeOf ctrl Is HtmlInputCheckBox Then Dim chkbox As HtmlInputCheckBox = CType(ctrl, HtmlInputCheckBox) If [login to view URL] Then 'Blah Else 'Blah End If End If Next Can it be done or is it not working because the controls are not actually rendered on page (not shown in source code)? Thanks for looking. Not a big job I hope and I'll leave great feedback if you can sort it! I use 'AnyDesk' if you would need to remote to my PC and show me.