$(function() {
        var dates = $( "#datefrom, #dateto" ).datepicker({
          defaultDate: "+1w",
          changeMonth: true,
          numberOfMonths: 3,
          dateFormat: "yy-mm-dd",
          onSelect: function( selectedDate ) {
            var option = this.id == "datefrom" ? "minDate" : "maxDate",
              instance = $( this ).data( "datepicker" );
              date = $.datepicker.parseDate(
                instance.settings.dateFormat ||
                $.datepicker._defaults.dateFormat,
                selectedDate, instance.settings );
            dates.not( this ).datepicker( "option", option, date );
          }
        });
      });