$(function() {
    $(".txtdata").datepicker({
        changeMonth: true,
        changeYear: true,
        showOn: 'button',
        buttonImage: '/Content/icon_calendar5.gif',
        buttonImageOnly: true,
        dateFormat: 'dd/mm/yy',
        startDate: '28/09/2010', 
        endDate: '02/10/2010' 
    });
});