In my application having so many datepicker contols.where should i give this properties commonly.

how should i pass dynamically in my textbox ID (or) which .js file i will set this properties commonly.

<script type="text/javascript">
    $(function() {
        $("input[id$=txtDate]").datepicker({
            changeMonth: true,
            changeYear: true,
            dateFormat: 'dd/mm/yy'
        });
    });
    </script>

Thanks in advance.