diff --git a/app/controllers/collection.php b/app/controllers/collection.php
index 7196f5d..ac54dc4 100644
--- a/app/controllers/collection.php
+++ b/app/controllers/collection.php
@@ -104,7 +104,7 @@ public function doIndex() {
 		$params = xn();
 		if ($this->_logQuery && count($params) > 3) {//not only "action", "db" and "collection"
 			$logDir = dirname(__ROOT__) . DS . "logs";
-			if (!empty($params["criteria"]) && strlen(trim($params["criteria"], "{} \t\n\r")) > 0) {
+			if (!empty($params["criteria"]) && mb_strlen(trim($params["criteria"], "{} \t\n\r")) > 0) {
 				if (is_writable($logDir)) {
 					$logFile = $this->_logFile($this->db, $this->collection);
 					$fp = null;
diff --git a/app/funcs/functions.php b/app/funcs/functions.php
index 7a6c269..0bb0953 100644
--- a/app/funcs/functions.php
+++ b/app/funcs/functions.php
@@ -39,11 +39,12 @@ function json_format_html($json)
     $indent_level = 0;
     $in_string = false;
 
-    $len = strlen($json);
+    $len	= mb_strlen($json);
+    $chars	= preg_split('//u',$json, -1, PREG_SPLIT_NO_EMPTY);
 
     for($c = 0; $c < $len; $c++)
     {
-        $char = $json[$c];
+    	$char = $chars[$c];
         switch($char)
         {
             case '{':
@@ -89,7 +90,7 @@ function json_format_html($json)
                 }
                 break;
             case '"':
-                if($c > 0 && $json[$c-1] != '\\') {
+                if($c > 0 && $chars[$c-1] != '\\') {
                     $in_string = !$in_string;
                     if ($in_string) {
                     	$new_json .= "<font color=\"#DD0000\" class=\"string_var\">" . $char;
@@ -171,7 +172,7 @@ function json_format($json)
 
     $json = json_encode($json_obj);
 */
-    $len = strlen($json);
+    $len = mb_strlen($json);
 
     for($c = 0; $c < $len; $c++)
     {
diff --git a/app/lib/mongo/RQuery.php b/app/lib/mongo/RQuery.php
index cac2510..e8def2c 100644
--- a/app/lib/mongo/RQuery.php
+++ b/app/lib/mongo/RQuery.php
@@ -59,7 +59,7 @@ function attr($nameOrAttrs, $value = null) {
 			$nameOrAttrs = array( $nameOrAttrs => $value );
 		}
 		foreach ($nameOrAttrs as $attr => $value) {
-			if ($attr == "_id" && (!is_object($value) || !($value instanceof MongoId)) && strlen($attr) == 24) {
+			if ($attr == "_id" && (!is_object($value) || !($value instanceof MongoId)) && mb_strlen($attr) == 24) {
 				$value = new MongoId($value);
 			}
 			if (!isset($this->_attrs[$attr])) {
diff --git a/app/lib/page/RPage.php b/app/lib/page/RPage.php
index caeae86..2b167e6 100644
--- a/app/lib/page/RPage.php
+++ b/app/lib/page/RPage.php
@@ -318,7 +318,7 @@ function setAutoQuery($bool = true, $except = "", $only = "") {
 		if (!is_array($except)) {
 			$except = preg_split("/\\s+,\\s+/", $except);
 		}
-		if (!is_array($only) && strlen($only) > 0) {
+		if (!is_array($only) && mb_strlen($only) > 0) {
 			$only = preg_split("/\\s+,\\s+/", $only);
 		}
 		if ($bool) {
diff --git a/themes/default/views/header.php b/themes/default/views/header.php
index e480fac..0ee2e80 100644
--- a/themes/default/views/header.php
+++ b/themes/default/views/header.php
@@ -12,6 +12,31 @@
 	$(document).click(window.parent.hideMenus);
 	if ($("textarea").length > 0) {
 		$("textarea").tabby();
+		
+		
+		// Search with ID field 
+ 		var elTextField = $("<input />").attr({type: 'text', size: 30}).keypress(function(e) {
+	            if (e.keyCode == '13') {
+	                e.preventDefault();
+	                $(this).parent().find('input:last').click();
+	            }
+	        });
+        	var elButton    = $("<input />").attr({type: 'button', value: 'Select by ID'})
+	                                        .bind('click', function (e) {
+	                                            var v = $(this).parent().find('input:first').val();
+	                                            // заветная строка!
+	                                            $('#query_form textarea').val('{\n\"_id\": ObjectId(\"'+v+'\")\n}');
+	                                            $('#query_form').submit();
+	                                        });
+	        $("<div />")
+	            .html('_id: ')
+	            .css({paddingLeft: 5, paddingTop: 4})
+	            .append(elTextField)
+	            .append(' ')
+	            .append(elButton)
+	            .prependTo('#query_form');
+            
+            
 	}
 });
 </script>