diff --git a/admin/index_m.html b/admin/index_m.html
index 3f40681..c3a9305 100644
--- a/admin/index_m.html
+++ b/admin/index_m.html
@@ -28,6 +28,41 @@
 <!-- you have to define 2 functions in the global scope: -->
 <script type="text/javascript">
 
+    var typeItemsLen = {
+        'uint8be':    1,
+        'uint8le':    1,
+        'int8be':     1,
+        'int8le':     1,
+        'uint16be':   1,
+        'uint16le':   1,
+        'int16be':    1,
+        'int16le':    1,
+        'int16be1':   1,
+        'int16le1':   1,
+        'uint32be':   2,
+        'uint32le':   2,
+        'uint32sw':   2,
+        'uint32sb':   2,
+        'int32be':    2,
+        'int32le':    2,
+        'int32sw':    2,
+        'int32sb':    2,
+        'uint64be':   4,
+        'uint64le':   4,
+        'int64be':    4,
+        'int64le':    4,
+        'floatbe':    2,
+        'floatle':    2,
+        'floatsw':    2,
+        'floatsb':    2,
+        'doublebe':   4,
+        'doublele':   4,
+        'string':     0,
+        'stringle':   0,
+        'ieee754':    2
+    };
+
+
     function switchOneType(data, id) {
         /*
         var isDirect = $('#modbus_directAddresses').prop('checked');