diff --git a/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx b/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx
index d122147..a3cd85e 100644
--- a/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx
+++ b/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx
@@ -29,7 +29,8 @@
         </asp:TemplateField>
         <asp:TemplateField>
             <HeaderTemplate>
-                <asp:LinkButton ID="lbtShowAll" runat="server" OnClick="lbtShowAll_Click" CssClass="fa fa-eye fa-2x" Visible="true"></asp:LinkButton>
+                <asp:LinkButton ID="lbtShowAll" runat="server" OnClick="lbtShowAll_Click" CssClass="fa fa-eye fa-2x" Visible='<%# showDescrColl %>'></asp:LinkButton>
+                <asp:LinkButton ID="lbtHide" runat="server" OnClick="lbtHideAll_Click" CssClass="fa fa-eye-slash fa-2x" Visible='<%# !showDescrColl %>'></asp:LinkButton>
             </HeaderTemplate>
             <ItemTemplate>
                 <div class='<%# string.Format("sc_{0}", Eval("Stato")) %>'>
diff --git a/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx.cs b/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx.cs
index c8091fc..1d63520 100644
--- a/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx.cs
+++ b/CMS_SC/WebUserControls/mod_StatoCollaudi.ascx.cs
@@ -130,6 +130,10 @@ namespace CMS_SC.WebUserControls
             savePar("ddlSelScheda", "");
             raiseEvent(ucEvType.ReqUpdateParent);
         }
+        protected void lbtHideAll_Click(object sender, EventArgs e)
+        {
+            resetSelezione();
+        }
         /// <summary>
         /// resetto selezione
         /// </summary>
diff --git a/CMS_SC/bin/CMS_SC.dll b/CMS_SC/bin/CMS_SC.dll
index 0d6fb3d..af64328 100644
Binary files a/CMS_SC/bin/CMS_SC.dll and b/CMS_SC/bin/CMS_SC.dll differ