diff --git a/README.md b/README.md
index 2c4e80c..435afd5 100644
--- a/README.md
+++ b/README.md
@@ -4,10 +4,3 @@ Launch application in development environment.
 ```
 $ php -S 0.0.0.0:9090 -t .
 ```
-
-Enable CORS on server side
-```
-header('Access-Control-Allow-Origin: *');
-header("Access-Control-Allow-Headers: *");
-if($_SERVER['REQUEST_METHOD'] == "OPTIONS") die();
-```
diff --git a/clockIn.html b/clockIn.html
index d1351d5..b91bdcb 100644
--- a/clockIn.html
+++ b/clockIn.html
@@ -67,6 +67,6 @@ and open the template in the editor.
         </div>
         <script src="config.js" type="text/javascript"></script>
         <script src="js/main.js" type="text/javascript"></script>
-        <script src="js/clock.js" type="text/javascript"></script>
+        <script src="js/clockIn.js" type="text/javascript"></script>
     </body>
 </html>
\ No newline at end of file
diff --git a/css/style.css b/css/style.css
index 29f96d8..9153950 100644
--- a/css/style.css
+++ b/css/style.css
@@ -284,25 +284,18 @@ header{
     opacity: 1;
 }
 
-.confirm{
+.confirm {
     display: none;
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
+    color: #fff;
     background: #8DD202;
-    color: #fff;
 }
-.confirmKO{
-    display: inline;
-    position: fixed;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100%;
+.confirm.confirmKO {
     background: rgba(237,73,71);
-    color: #fff;
 }
 
 .contConfirm{
diff --git a/js/clockIn.js b/js/clockIn.js
index 092f534..3490712 100644
--- a/js/clockIn.js
+++ b/js/clockIn.js
@@ -143,17 +143,8 @@ var weekDays = [
     'Sábado'
 ];
 
-function printError(msg){
-    $(".txtConfirm").empty();
-    $(".txtConfirm").append(msg);
-    $(".txtConfirm").append("<br>");
-    $(".loading").fadeOut(200);
-    $(".confirm").addClass('confirmKO');
-}
-
 function printErrores(errores) {
     var error ='';
-    $(".txtConfirm").empty();
     for (var i = 0; i < errores.length; i++) {
         if (errores[i].error) {
            error += errores[i].error + "<br>";
diff --git a/js/index.js b/js/index.js
index 89da24f..9e25ccd 100644
--- a/js/index.js
+++ b/js/index.js
@@ -29,16 +29,19 @@ function setEvents() {
 }
 
 function login() {
+    $(".loading").fadeIn(200);
     $.post({
         urlPath: 'login',
         jsonData: [pin],
         processData: false,
         success: function (data) {
             localStorage.setItem("userData", JSON.stringify(data));
-            $("#txtPin").text("USUARIO O DNI");
-            pin = "";
             window.location = "clockIn.html";
+        },
+        error: function() {
             $(".loading").fadeOut(200);
+            $("#txtPin").text("USUARIO");
+            pin = "";
         }
     });
 
diff --git a/js/main.js b/js/main.js
index 10c2b42..bdf2ac7 100644
--- a/js/main.js
+++ b/js/main.js
@@ -1,20 +1,25 @@
 var config = config[process.env.NODE_ENV];
 var urlBase = config.urlBase;
 
+function confirmReset() {
+    $(".confirm").removeClass('confirmKO');
+    $(".txtConfirm").empty();
+}
 
 function printError(msg){
-    $(".txtConfirm").empty();
+    confirmReset();
     $(".txtConfirm").append(msg);
     $(".confirm").addClass('confirmKO');
-    pin = "";
-    $("#txtPin").text("USUARIO");
+    $(".confirm").fadeIn(200);
     setTimeout(function() {
-        $(".confirm").removeClass('confirmKO');
+        $(".confirm").fadeOut(200);
+        setTimeout(confirmReset, 200);
     }, 1500);
 }
 
 $.ajaxPrefilter(function(xhr) {
-    $(".loading").fadeIn(200);
+    var orgErrorHandler = xhr.error;
+
     Object.assign(xhr, {
         url: `${urlBase}/workerTimeControl/${xhr.urlPath}`,
         headers: {
@@ -26,8 +31,14 @@ $.ajaxPrefilter(function(xhr) {
         dataType: 'json',
         processData: false,
         data: JSON.stringify(xhr.jsonData),
-        error: function (xhr, textStatus, err) {
-            var mensaje;
+        error: function(xhr, textStatus, err) {
+            if (orgErrorHandler) {
+                try {
+                    orgErrorHandler(xhr, textStatus, err);
+                } catch (e) {
+                    err = e;
+                }
+            }
 
             switch (textStatus){
                 case 'parsererror':
@@ -58,9 +69,6 @@ $.ajaxPrefilter(function(xhr) {
                     mensaje = 'Ha ocurrido un error, consulta con informática';
             }
             printError(mensaje);  
-        },
-        complete: function() {
-            $(".loading").fadeOut(200); 
         }
     });
 });