$(document).ready(function(){
 //$(selector).datepick({dateFormat: 'yyyy-mm-dd'});
  daysfrom = $("select[name='daysfrom']");
  daysto = $("select[name='daysto']");
  
  daysfrom.change(function(){
	if(parseInt(daysfrom.val()) > parseInt(daysto.val())) {daysto.val(parseInt(daysfrom.val()))};
  });
  daysto.change(function(){
	if(parseInt(daysfrom.val()) > parseInt(daysto.val())) {daysfrom.val(parseInt(daysto.val()))};
  });
 
 
 $('#startPicker,#endPicker').datepick({
 dateFormat: 'dd.mm.yyyy',
 onSelect: customRange,
 showTrigger: '#calImg'
 });
})


function customRange(dates) {
 if (this.id == 'startPicker') {
 $('#endPicker').datepick('option', 'minDate', dates[0] || null);
 }
 else {
 $('#startPicker').datepick('option', 'maxDate', dates[0] || null);
 }
}