function dateSearch(start_time, end_time){
	var dates = $('#' + start_time + ', #' + end_time).datepicker({
		changeMonth: true,	//Thay d?i du?c tháng
		changeYear: true,	//Thay d?i du?c nam
		onSelect: function(selectedDate) {	//Ð?m b?o start_time <= end_time
			var option = this.id == start_time ? "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);
		} 
	});
};