$(document).ready(function () {
	$('#country_id').change(function () {
		var country_id = $(this).val();
		if (country_id == '0') {
			$('#region_id').html('<option>- выберите регион -</option>');
			$('#region_id').attr('disabled', true);
			$('#city_id').html('<option>- выберите город -</option>');
			$('#city_id').attr('disabled', true);
			return(false);
		}
		$('#region_id').attr('disabled', true);
		$('#region_id').html('<option>загрузка...</option>');
		
		var url = 'get_regions.php';
		
		$.get(
			url,
			"country_id=" + country_id,
			function (result) {
				if (result.type == 'error') {
					alert('error');
					return(false);
				}
				else {
					var options = ''; 
					
					$(result.regions).each(function() {
						options += '<option value="' + $(this).attr('region_id') + '">' + $(this).attr('name') + '</option>';
					});
					
					$('#region_id').html('<option value="0">- выберите регион -</option>'+options);
					$('#region_id').attr('disabled', false);
					$('#city_id').html('<option>- выберите город -</option>');
					$('#city_id').attr('disabled', true);  	
							
				}
			},
			"json"
		);
	});

$('#region_id').change(function () {
		var region_id = $(this).val(); //$('#region_id :selected').val();
		//alert (region_id);
		if (region_id == '0') {
			$('#city_id').html('<option>- выберите город -</option>');
			$('#city_id').attr('disabled', true);
			return(false);
		}
		$('#city_id').attr('disabled', true);
		$('#city_id').html('<option>загрузка...</option>');
		
		var url = "https://www.tests-exam.ru/get_city.php";
		
		$.get(
			url,
			"region_id=" + region_id,
			
			function (result) {
				//alert(result);
				if (result.type == 'error') {
					alert('error');
					return(false);
				}
				else {
					var options = ''; 
					//alert(result.citys[0]['name']);
					$(result.citys).each(function() {
						options += '<option value="' + $(this).attr('city_id') + '">' + $(this).attr('name') + '</option>'; 
					 //alert($(this).attr('name'));	
					});
					$('#city_id').html('<option value="0">- выберите город -</option>'+options);		
					$('#city_id').attr('disabled', false);
					
$('#city_id').change(function(){
	                            var value = $('#city_id :selected').text();
	                            var city_id = $('#city_id :selected').val(); 
	                            var region_id = $('#region_id :selected').val();
								if (city_id !== '0')
         									{
	                                         document.location.href = "https://www.tests-exam.ru/chop_region.html?id_regiona="+region_id+"&id_city="+city_id;
	                                         	
                                            } 
                               }
				      );					
	}
			},
			"json" 
		);
	});	
});