diff --git a/examples/js/all.js b/examples/js/all.js
index 54b1ac2..5c50669 100644
--- a/examples/js/all.js
+++ b/examples/js/all.js
@@ -133,12 +133,22 @@ $(function () {
 					$tooltip.hide();
 				},
 				check: function (obj) {
+					var $input = $(this);
+
 					if (obj) {
-						setLabel($(this), obj.type);
+						setLabel($input, obj.type);
 						$tooltip.hide();
 					}
 					else {
-						showError($(this), 'Введено неверно');
+						showError($input, 'Введено неверно');
+					}
+				},
+				checkBefore: function () {
+					var $input = $(this);
+
+					if (!$.trim($input.val())) {
+						$tooltip.hide();
+						return false;
 					}
 				}
 			});
@@ -247,6 +257,16 @@ $(function () {
 					log(obj);
 					addressUpdate();
 					mapUpdate();
+				},
+				checkBefore: function () {
+					var $input = $(this);
+
+					if (!$.trim($input.val())) {
+						log(null);
+						addressUpdate();
+						mapUpdate();
+						return false;
+					}
 				}
 			});
 
@@ -288,26 +308,18 @@ $(function () {
 		function mapUpdate() {
 			var zoom = 4;
 
-			var address = $.kladr.getAddress($container.find('.js-form-address'), function (objs) {
-				var result = '',
-					name = '',
-					type = '';
+			var address = $.kladr.getAddress('.js-form-address', function (objs) {
+				var result = '';
 
-				for (var i in objs) {
-					if (objs.hasOwnProperty(i)) {
-						if ($.type(objs[i]) === 'object') {
-							name = objs[i].name;
-							type = ' ' + objs[i].type;
-						}
-						else {
-							name = objs[i];
-							type = '';
-						}
+				$.each(objs, function (i, obj) {
+					var name = '',
+						type = '';
 
-						if (result) result += ', ';
-						result += type + name;
+					if ($.type(obj) === 'object') {
+						name = obj.name;
+						type = ' ' + obj.type;
 
-						switch (objs[i].contentType) {
+						switch (obj.contentType) {
 							case $.kladr.type.region:
 								zoom = 4;
 								break;
@@ -329,7 +341,13 @@ $(function () {
 								break;
 						}
 					}
-				}
+					else {
+						name = obj;
+					}
+
+					if (result) result += ', ';
+					result += type + name;
+				});
 
 				return result;
 			});
diff --git a/examples/js/form.js b/examples/js/form.js
index b8ab8e8..944b9e7 100644
--- a/examples/js/form.js
+++ b/examples/js/form.js
@@ -16,12 +16,22 @@ $(function () {
 			$tooltip.hide();
 		},
 		check: function (obj) {
+			var $input = $(this);
+
 			if (obj) {
-				setLabel($(this), obj.type);
+				setLabel($input, obj.type);
 				$tooltip.hide();
 			}
 			else {
-				showError($(this), 'Введено неверно');
+				showError($input, 'Введено неверно');
+			}
+		},
+		checkBefore: function () {
+			var $input = $(this);
+
+			if (!$.trim($input.val())) {
+				$tooltip.hide();
+				return false;
 			}
 		}
 	});
diff --git a/examples/js/form_with_map.js b/examples/js/form_with_map.js
index 0aa43d0..396c0ac 100644
--- a/examples/js/form_with_map.js
+++ b/examples/js/form_with_map.js
@@ -58,6 +58,16 @@ $(function () {
 			log(obj);
 			addressUpdate();
 			mapUpdate();
+		},
+		checkBefore: function () {
+			var $input = $(this);
+
+			if (!$.trim($input.val())) {
+				log(null);
+				addressUpdate();
+				mapUpdate();
+				return false;
+			}
 		}
 	});
 
@@ -100,25 +110,17 @@ $(function () {
 		var zoom = 4;
 
 		var address = $.kladr.getAddress('.js-form-address', function (objs) {
-			var result = '',
-				name = '',
-				type = '';
-
-			for (var i in objs) {
-				if (objs.hasOwnProperty(i)) {
-					if ($.type(objs[i]) === 'object') {
-						name = objs[i].name;
-						type = ' ' + objs[i].type;
-					}
-					else {
-						name = objs[i];
-						type = '';
-					}
+			var result = '';
+
+			$.each(objs, function (i, obj) {
+				var name = '',
+					type = '';
 
-					if (result) result += ', ';
-					result += type + name;
+				if ($.type(obj) === 'object') {
+					name = obj.name;
+					type = ' ' + obj.type;
 
-					switch (objs[i].contentType) {
+					switch (obj.contentType) {
 						case $.kladr.type.region:
 							zoom = 4;
 							break;
@@ -140,7 +142,13 @@ $(function () {
 							break;
 					}
 				}
-			}
+				else {
+					name = obj;
+				}
+
+				if (result) result += ', ';
+				result += type + name;
+			});
 
 			return result;
 		});