$(document).ready(function() {
    $.datepicker.setDefaults($.extend({
        minDate: 0,
        maxDate: '+2y',
        changeMonth: true,
        changeYear: true,
        dateFormat: 'dd.mm.yy'
    }, $.datepicker.regional['de']));

    $('input.date').datepicker();

    $('#box_filter_hinreise').datepicker({
        beforeShow: function() {
            var maxDate = $('#box_filter_rueckreise').datepicker('getDate');

            if(maxDate)
            {
                return {
                    maxDate: maxDate
                };
            }
        }
    })
    $('#box_filter_rueckreise').datepicker({
        beforeShow: function() {
            var minDate = $('#box_filter_hinreise').datepicker('getDate');

            if(minDate)
            {
                return {
                    minDate: minDate
                };
            }
        }
    })
});