$(function() {
		var dates = $('#anreise, #abreise').datepicker({
			defaultDate: "+1w",
			changeMonth: false,
			numberOfMonths: 1,
			showOn: 'button', 
      buttonImage: 'css/custom-theme/images/calendar.png', 
      buttonImageOnly: true,

			onSelect: function(selectedDate) {
				var option = this.id == "anreise" ? "minDate" : "maxDate";
				var instance = $(this).data("datepicker");
				var date = $.datepicker.parseDate(instance.settings.dateFormat || $.datepicker._defaults.dateFormat, selectedDate, instance.settings);
				dates.not(this).datepicker("option", option, date);
			}
		});
	});