$(function() {
	
$('input#date_abreise,input#date_rueckreise').datepick({changeMonth: false, changeYear: false, beforeShow: customRange, 
    showOn: 'both', buttonImageOnly: true, buttonImage: '/img/calendar.gif', buttonText: 'Datum wählen', numberOfMonths: 2});

$('input#buchbar_start,input#buchbar_ende').datepick({changeMonth: false, changeYear: false, beforeShow: customRangeB, 
    showOn: 'both', buttonImageOnly: true, buttonImage: '/img/calendar.gif', buttonText: 'Datum wählen', numberOfMonths: 2}); 
     
});

function customRange(input) {  
    return {minDate: (input.id == "date_rueckreise" ? 
        $("input#date_abreise").datepick("getDate") : null),  
        maxDate: (input.id == "date_abreise" ? 
        $("input#date_rueckreise").datepick("getDate") : null)};  
}

function customRangeB(input) {  
    return {minDate: (input.id == "buchbar_ende" ? 
        $("input#buchbar_start").datepick("getDate") : null),  
        maxDate: (input.id == "buchbar_start" ? 
        $("input#buchbar_ende").datepick("getDate") : null)};  
}