diff --git a/Customers/CustomsAviso.aspx b/Customers/CustomsAviso.aspx
index 7c32371..bf3eb44 100644
--- a/Customers/CustomsAviso.aspx
+++ b/Customers/CustomsAviso.aspx
@@ -104,14 +104,14 @@
                             <div class="col-12" id="cont4">                                
                             <div class="col-12" id="container2" style="margin-left:2px;">                                                                     
                                             <asp:Label ID="lbl_von" runat="server" Text="Von:"></asp:Label>                                             
-                                            <asp:TextBox id="pickdate1" Type="Date" CssClass="classTarget" requiered="true" runat="server"></asp:TextBox>  
-                                    <asp:CustomValidator runat="server" ID="valDateRange_1" ControlToValidate="pickdate1" onservervalidate="valDateRange_1_ServerValidate" ErrorMessage="enter valid date" />   
+                                            <asp:TextBox id="pickdate1" Type="Date" CssClass="classTarget" requiered="true" OnTextChanged="pickdate1_TextChanged" runat="server"></asp:TextBox>  
+                                    <asp:CustomValidator runat="server" ID="valDateRange_1" ControlToValidate="pickdate1"  Display="Dynamic" onservervalidate="valDateRange_1_ServerValidate" ErrorMessage="" SetFocusOnError="true" ValidationGroup="DateValid" />   
                                 <!--<asp:RequiredFieldValidator ID="RequiredFieldValidatorvon" runat="server" ErrorMessage="Field required" ControlToValidate="pickdate1" Text="Required" ForeColor="White" Font-Strikeout="False" Font-Underline="False" Font-Overline="False" Font-Bold="True" BackColor="Red"></asp:RequiredFieldValidator>              
                                             <asp:CustomValidator ValidateEmptyText="false" ClientValidationFunction="instantValidation"></asp:CustomValidator>            -->
                                 <asp:Label ID="lbl_bis" runat="server" Text="Bis:"></asp:Label> 
                                            <!-- <asp:RequiredFieldValidator ID="RequiredFieldValidatorbis" ClientValidationFunction="validate" runat="server" ErrorMessage="Field required" ControlToValidate="pickdate2" Text="Required" ForeColor="White" Font-Strikeout="False" Font-Underline="False" Font-Overline="False" Font-Bold="True" BackColor="Red"></asp:RequiredFieldValidator>              -->
-                                            <asp:TextBox id="pickdate2" Type="Date" CssClass="classTarget" required="true" runat="server"></asp:TextBox>
-                                    <asp:CustomValidator runat="server" ID="valDateRange_2" ControlToValidate="pickdate2" onservervalidate="valDateRange_2_ServerValidate" ErrorMessage="enter valid date" />             
+                                            <asp:TextBox id="pickdate2" Type="Date" CssClass="classTarget" OnTextChanged="pickdate2_TextChanged" required="true" runat="server"></asp:TextBox>
+                                    <asp:CustomValidator runat="server" ID="valDateRange_2" ControlToValidate="pickdate2" Display="Dynamic" onservervalidate="valDateRange_2_ServerValidate" ErrorMessage="" SetFocusOnError="true" ValidationGroup="DateValid"/>             
                             </div>                                      
                              <div id="Abstand"></div>  
                               <hr>
diff --git a/Customers/CustomsAviso.aspx.vb b/Customers/CustomsAviso.aspx.vb
index 47a7ffa..570c460 100644
--- a/Customers/CustomsAviso.aspx.vb
+++ b/Customers/CustomsAviso.aspx.vb
@@ -464,19 +464,11 @@ Partial Class Kundenbereich_Default
     End Sub
 
     Protected Sub pickdate1_TextChanged(sender As Object, e As EventArgs)
-        If pickdate1.Text = "" Then
-            pickdate1.BorderColor = Drawing.Color.Red
-        Else
-            pickdate1.BorderStyle = BorderStyle.None
-        End If
+        valDateRange_1.Validate()
     End Sub
 
     Protected Sub pickdate2_TextChanged(sender As Object, e As EventArgs)
-        If pickdate2.Text = "" Then
-            pickdate2.Attributes.Add("Border", "2px solid red")
-        Else
-            pickdate2.BorderStyle = BorderStyle.None
-        End If
+        valDateRange_2.Validate()
     End Sub
     Protected Sub valDateRange_1_ServerValidate(source As Object, args As ServerValidateEventArgs)
         Dim minDate As DateTime = DateTime.Parse("01.04.2001")
diff --git a/css/Customers/CustomerAVISO.css b/css/Customers/CustomerAVISO.css
index 5c0d65a..44a951b 100644
--- a/css/Customers/CustomerAVISO.css
+++ b/css/Customers/CustomerAVISO.css
@@ -157,6 +157,13 @@ hr{
 }
 #pickdate1:invalid{
     border: 1px solid red;
+    background-color:lightcoral;
+}#pickdate2:valid{
+    color:black;
+}
+#pickdate2:invalid{
+    border: 1px solid red;
+    background-color:lightcoral;
 }
 @media (max-width: 558.98px) {
     h1 {