$(function() {

    $('#txtStartDate, #txtEndDate').datepicker({
        showOn: "both",
        beforeShow: customRange,
        dateFormat: "dd M yy",
    });

});

function customRange(input) {

    if (input.id == 'txtEndDate') {
        var minDate = new Date($('#txtStartDate').val());
        minDate.setDate(minDate.getDate() + 1)

        return {
            minDate: minDate

        };
    }

}​