title: fullcalendar set color of dropped div
body: <p>This is my full calendar implementation:</p>
  
  <pre><code>$(renderTo).fullCalendar({
          timeFormat: 'HH:mm',
          axisFormat: 'HH:mm',
          defaultView:view,
          firstHour:  7,
          firstDay:   1,
          titleFormat: {
              month: 'MMMM yyyy',
              week: "MMM d[ yyyy]{ '&amp;#8212;'[ MMM] d yyyy}",
              day: 'dddd, d MMM yyyy',
          },
          columnFormat: {
              month: 'ddd',
              week: 'ddd, dd.MM',
              day: 'dddd, dd.MM'
          },
          header: {
              left: 'prev,next today',
              center: 'title',
              right: 'month,agendaWeek,agendaDay'
          },
          buttonText: {
              prev: '&amp;lt;',
              next: '&amp;gt;',
              prevYear: '&amp;laquo;',
              nextYear: '&amp;raquo;',
              today:    'dziś',
              month:    'miesiąc',
              week:     'tydzień',
              day:      'dzień'
          },
          monthNames: ['Styczeń', 'Luty', 'Marzec', 'Kwiecień', 'Maj', 'Czerwiec', 'Lipiec', 'Sierpień', 'Wrzesień', 'Październik', 'Listopad', 'Grudzień'],
          monthNamesShort: ['Sty', 'Lut', 'Mar', 'Kwi', 'Maj', 'Cze', 'Lip', 'Sie', 'Wrz', 'Paź', 'Lis', 'Gru'],
          dayNames: ['Niedziela', 'Poniedziałek', 'Wtorek', 'Środa', 'Czwartek', 'Piątek', 'Sobota'],
          dayNamesShort: ['Nie', 'Pon', 'Wto', 'Śro', 'Czw', 'Pią', 'Sob'],
          editable: true,
          eventDrop: function(event,dayDelta,minuteDelta,allDay,revertFunc) {
              result = updateEvent(event.id,dayDelta,minuteDelta,allDay,'false');
              if (result == true) {
              } else {
                  revertFunc();
                  alert(result);
              }
          },
                  eventMouseover: function( event, jsEvent, view ) { 
                      var details = getDetails(event.id, $(this));
                                      },
          eventResize: function(event,dayDelta,minuteDelta,revertFunc) {
              result = updateEvent(event.id,dayDelta,minuteDelta,'false','true');
              if (result == true) {
                  //alert('Zmiana została zapisana');
              } else {
                  revertFunc();
                  alert(result);
              }
          },
          droppable: true, // this allows things to be dropped onto the calendar !!!
          drop: function(date, allDay) {
              var originalEventObject = $(this).data('eventObject');
              var copiedEventObject = $.extend({}, originalEventObject);
              copiedEventObject.start     = date;
              copiedEventObject.allDay    = allDay;
  
              //$time
              result  = addNewEvent(copiedEventObject.start.toISOString(),originalEventObject.title,originalEventObject.allDay);
              if (result == true) {
                  var currentView = $(renderTo).fullCalendar('getView');
                  renderCalendar(renderTo,currentView.name);
              } else {
                  alert(result);
              }
          },
          events: {
              url:    '/schedule/getCalendarEvents',
              data: {
                  agent_id: &lt;?php echo $this-&gt;user_info-&gt;id; ?&gt;,
              },
              error: function() {
                  alert('Wystąpił problem w czasie pobierania danych!');
              },
              //color: 'yellow',   // a non-ajax option
              textColor: 'black' // a non-ajax option
          },
  
          loading: function(bool) {
              if (bool) $('#loading').show();
              else $('#loading').hide();
          }
      });
  </code></pre>
  
  <p>and I want to drop this div:</p>
  
  <pre><code>&lt;div class="external-event ui-draggable" style="position: relative;background-color:red"&gt;sdf&lt;/div&gt;
  </code></pre>
  
  <p>How to change background-color dynamicaly when droping event wiht dropped div</p>
  
  <p>so in this example I would like have new event bg-color:red</p>