Global.asax wurde gefixed-

Customers/CustomsAviso.aspx

@@ -216,9 +216,7 @@
     <script src="https://cdn.jsdelivr.net/jquery.validation/1.16.0/jquery.validate.min.js"></script>
 <script src="https://cdn.jsdelivr.net/jquery.validation/1.16.0/additional-methods.min.js"></script>
 <script>       
-    
    function GetSelectedVal(ele) {        
-        
        var el = $(ele).closest('label').text();
        var date1 = document.getElementById('<%=pickdate1.ClientID%>');
        var date2 = document.getElementById('<%=pickdate2.ClientID%>');

Customers/CustomsAviso.aspx.vb

@@ -22,7 +22,6 @@ Partial Class Kundenbereich_Default
             normaltable.EnableViewState = True
             datevon = Date.Parse(pickdate1.Text)
             datebis = Date.Parse(pickdate2.Text)
-
         Else
             normaltable.EnableViewState = True
             Dim erster = New Date(Now().Year, Now().Month, 1)
@@ -32,10 +31,6 @@ Partial Class Kundenbereich_Default
             datevon = ersterdat
             datebis = Date.Parse(Now().Day.ToString + "." + Now().Month.ToString + "." + Now().Year.ToString).ToString
             pickdate2.Text = Date.Parse(Now().Day.ToString + "." + Now().Month.ToString + "." + Now().Year.ToString).ToString
-
-            rbt_Alle.Checked = True
-            rbt_Alle_M.Checked = True
-
         End If
     End Sub
 

Global.asax

@@ -4,6 +4,7 @@
 
     void Application_Start(object sender, EventArgs e) 
     {
+        // Code, der beim Anwendungsstart ausgeführt wird
            // Code that runs on application startup
     ScriptManager.ScriptResourceMapping.AddDefinition("jquery", 
     new ScriptResourceDefinition
@@ -13,6 +14,7 @@
         CdnPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.4.1.min.js",
         CdnDebugPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.4.1.js"
     });
+    
     }
     
     void Application_End(object sender, EventArgs e) 
@@ -42,4 +44,5 @@
 
     }
     
+       
 </script>

Web.config

@@ -29,6 +29,7 @@
     </authentication>
     <sessionState mode="InProc" timeout="2880" cookieless="true" regenerateExpiredSessionId="true" compressionEnabled="true" />
     <httpRuntime requestValidationMode="2.0" targetFramework="4.7" />
+	  
     <pages validateRequest="false" controlRenderingCompatibilityVersion="4.0" />
     <!--<securityPolicy>
       <trustLevel name="Full" policyFile="internal"/>
@@ -120,6 +121,8 @@
   </runtime>
 	<appSettings>
 		<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
+		<add key="ClientValidationEnabled" value="true"/>
+		<add key="UnobtrusiveJavaScriptEnabled" value="true"/>
 	</appSettings>
 </configuration>
 <!--ProjectGuid: 9b651bc0-361a-4f93-8118-dd8a986f2371-->