var DatePicked = function() {
                var departure2 = $("#departure2");
                var arrival2 = $("#arrival2");
                var nights = $("#nights");

                var triggeringElement = $(this);

                var departureDate = departure2.datepicker("getDate");

                var minArrivalDate = new Date();
                if (departureDate != null) {
                        minArrivalDate.setDate(departureDate.getDate() + 1);
                } else {
                        minArrivalDate.setDate(minArrivalDate.getDate() + 1);
                }
                arrival2.datepicker('option', 'minDate', minArrivalDate);

                var arrivalDate = arrival2.datepicker("getDate");

                if (departureDate != null && arrivalDate != null && triggeringElement.attr("id") != "nights") {
                        var oneDay = 1000*60*60*24;
                        var difference = Math.ceil((arrivalDate.getTime() - departureDate.getTime()) / oneDay);
                        nights.val(difference);
                } else if (departureDate != null && triggeringElement.attr("id") == "nights") {
                        var nightsEntered = parseInt(nights.val());
                        if (nightsEntered >= 2) {
                                var newArrivalDate = new Date();
                                newArrivalDate.setDate(departureDate.getDate() + nightsEntered);
                                arrival2.datepicker("setDate", newArrivalDate);
                        } else {
                                alert("Nights must be greater than 2.");
                        }
                }
        }
        $(function() {
                $("#departure2, #arrival2").datepicker({
                        onSelect: DatePicked
                });
                $("#nights").change(DatePicked);
                DatePicked();
        });

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}