diff --git a/web/CXM_form.anubis b/web/CXM_form.anubis
index 27ddaee..4ca15f3 100644
--- a/web/CXM_form.anubis
+++ b/web/CXM_form.anubis
@@ -97,17 +97,24 @@ public type CXM_Form_Field:
                    Maybe(InitialValue)  selected,
                    Mandatory      mandatory), 
                    
-   selector_c     (List(InputAttrs) options,
+   selector_c     (List(InputAttrs)    options,
+                   String              label, 
+                   HtmlId              id,
+                   WebArgName          web_arg_name, 
+                   Int                 size,
+                   List((List(CoreAttrs), WebArgValue, String))   items,
+                   Maybe(InitialValue) selected,
+                   Mandatory           mandatory), 
+   
+   selector_hide_show (List(InputAttrs) options,
                    String         label, 
                    HtmlId          id,
                    WebArgName     web_arg_name, 
                    Int           size,
-                   List((List(CoreAttrs),WebArgValue,String))   items,
+                   List((List(CoreAttrs), WebArgValue, String, HTML_Partial_Content))   items,
                    Maybe(InitialValue)  selected,
                    Mandatory      mandatory), 
    
-   
-   
    //--- checkbox field ------------------------------------------------------------------
    checkbox       (List(InputAttrs) options,
                    String         label, 
@@ -321,6 +328,31 @@ public define CXM_Form_Field
   
 // //////////////////////////////////////////////////////////
 
+define (List((List(CoreAttrs), WebArgValue, String)), List(HTML_Partial_Content))
+  construct_selector_hide_show
+  (
+    String div_id,
+    List((List(CoreAttrs), WebArgValue, String, HTML_Partial_Content)) items,
+    List((List(CoreAttrs), WebArgValue, String)) so_far_1,
+    List(HTML_Partial_Content) so_far_2,
+    Int n
+  ) =
+    if items is
+    {
+      [] then (so_far_1, so_far_2),
+      [h . t] then
+        since h is (cores, wav, label, content),
+          with linked_element = div_id + n,
+          construct_selector_hide_show(div_id, t, [([data("linked_element", linked_element) . cores], wav, label) . so_far_1], [ partial_content([], div([id(linked_element), style("display: none")], content)) . so_far_2 ], n + 1)
+    }.  
+    
+define (List((List(CoreAttrs), WebArgValue, String)), List(HTML_Partial_Content))
+  construct_selector_hide_show
+  (
+    String div_id,
+    List((List(CoreAttrs), WebArgValue, String, HTML_Partial_Content)) items
+  ) = construct_selector_hide_show(div_id, items, [], [], 0).
+
 public define HTML_In_Form
   cxm_format_form_field
   (
@@ -407,6 +439,14 @@ public define HTML_In_Form
          success(default) then selector_c([class("in") . options], label + star(mand), id, wan, size, items, init(get_String(lwa, wan.name, default.value))),
        },
     
+    selector_hide_show(options, label, id, wan, size, items_with_partial, selected, mand) then
+      with div_id = generate_random_string(15),
+      since construct_selector_hide_show(div_id, items_with_partial) is (items, partial_content_list), 
+      sequence([
+          selector_c([class("in"), event(onchange, "select_hide_show('" + div_id + "', this);")], label + star(mand), id, wan, size, reverse(items), if selected is { failure then init(""), success(default) then init(get_String(lwa, wan.name, default.value)) } ),
+              partial(partial_content(partial_content_list))
+            ]),
+    
     checkbox(options, label, id, wan, val, checked, mand) then
       check_box([class("in") . options], label + star(mand), id, wan, val, get_Bool(lwa, wan.name, checked)),
  
diff --git a/web/widgets/left_menu.anubis b/web/widgets/left_menu.anubis
index 3905cbb..5155c1a 100644
--- a/web/widgets/left_menu.anubis
+++ b/web/widgets/left_menu.anubis
@@ -41,11 +41,30 @@ public define Left_Menu_Entry
   .
   
 public define Left_Menu_Entry
+  left_menu_entry
+  (
+    String        entry_id,       //it's also use as icon prefix
+    String        action,         //action (url to apply when click
+    String        text,           //text to show
+    List((String, String)) extra  //extra web arguments to send when click
+  )=
+  left_menu_entry(entry_id, [], action, text, extra)
+  .
+  
+public define Left_Menu_Entry
   title
   (
     String  text
   )=
-  title("", [], text).
+  title("", [], text). 
+  
+public define Left_Menu_Entry
+  title
+  (  
+    String title_id,
+    String text
+  )=
+  title(title_id, [], text).
   
 define List(HTML_Off_Form)
   make_left_menu 
--
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