Question

How to disable the Calendar Extender in a page using JavaScript?

Answer 1

This script i found from msdn

<script type="text/javascript" language="javascript">
            function enableCalendar(){
                $get("<%=TextBox1.ClientID %>").disabled = false;
                $get('btnDisable').disabled = false;
                $get('btnEnable').disabled = true;
                $find('myCEID').set_button($get("<%=ImageButton1.ClientID%>"));
            }
            function disableCalendar(){
                $get("<%=TextBox1.ClientID %>").disabled = true;
                $get('btnDisable').disabled = true;
                $get('btnEnable').disabled = false;
                $find('myCEID').hide();
                $common.removeHandlers($find('myCEID')._button, $find('myCEID')._button$delegates);
                $find('myCEID')._button = null;
            }
        </script>

you can check full answer realted to this over there : disable CalendarExtender