diff --git a/admin/themes/default/sass/partials/_content.sass b/admin/themes/default/sass/partials/_content.sass
index 02f828538..54165bdf3 100644
--- a/admin/themes/default/sass/partials/_content.sass
+++ b/admin/themes/default/sass/partials/_content.sass
@@ -137,6 +137,23 @@ body
 				padding-right: 8px
 		.form-group
 			margin-bottom: 8px
+	#page-loader
+		position: fixed
+		display: none
+		inset: 0
+		z-index: 10000
+		background-color: rgba(0, 0, 0, 0.5)
+		span
+			position: absolute
+			inset: 0
+			display: flex
+			justify-content: center
+			align-items: center
+		i
+			color: #fff
+			font-size: 50px
+
+
 
 //data-focus
 .data-focus
diff --git a/admin/themes/default/template/header.tpl b/admin/themes/default/template/header.tpl
index 7f70613b4..e4c6fb00a 100644
--- a/admin/themes/default/template/header.tpl
+++ b/admin/themes/default/template/header.tpl
@@ -371,3 +371,4 @@
 		<div id="main">
 			<div id="content" class="{if !$bootstrap}nobootstrap{else}bootstrap{/if}">
 {/if}
+				<div id="page-loader"><span><i class="icon-refresh icon-spin icon-fw"></i></span></div>
\ No newline at end of file
diff --git a/js/admin/cart-rules.js b/js/admin/cart-rules.js
index 7a5bef5bd..94fda6ce3 100644
--- a/js/admin/cart-rules.js
+++ b/js/admin/cart-rules.js
@@ -49,6 +49,9 @@ $(document).ready(function() {
                     action: 'initCartRuleDeleteModal',
                     id_cart_rule: id_cart_rule
                 },
+                beforeSend: function() {
+                    $("#page-loader").show();
+                },
                 success: function(result) {
                     if (result.success && result.confirm_delete) {
                         $('#moduleConfirmDelete').remove();
@@ -61,6 +64,9 @@ $(document).ready(function() {
                             resolve(false);
                         });
                     }
+                },
+                complete: function() {
+                    $("#page-loader").hide();
                 }
             });
         });
diff --git a/js/admin/orders.js b/js/admin/orders.js
index ef096e790..948ef9513 100644
--- a/js/admin/orders.js
+++ b/js/admin/orders.js
@@ -1920,6 +1920,9 @@ const BookingDocumentsModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=InitBookingDocumentsModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -1935,6 +1938,7 @@ const BookingDocumentsModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
 
@@ -2105,6 +2109,9 @@ const VoucherModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=InitVoucherModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2115,6 +2122,7 @@ const VoucherModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2139,6 +2147,9 @@ const OrderPaymentModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=InitOrderPaymentModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2149,6 +2160,7 @@ const OrderPaymentModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2173,6 +2185,9 @@ const OrderPaymentDetailModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=InitOrderPaymentDetailModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2195,6 +2210,7 @@ const OrderPaymentDetailModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2216,6 +2232,9 @@ const DocumentNoteModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=InitOrderDocumentNoteModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2228,6 +2247,7 @@ const DocumentNoteModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2252,6 +2272,9 @@ const TravellerModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=InitTravellerModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2262,6 +2285,7 @@ const TravellerModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2330,6 +2354,9 @@ const RoomStatusModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=InitRoomStatusModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2356,6 +2383,7 @@ const RoomStatusModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2380,6 +2408,9 @@ const AddRoomBookingModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=initAddRoomBookingModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2467,6 +2498,7 @@ const AddRoomBookingModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2538,6 +2570,9 @@ const EditRoomBookingModal = {
             dataType: 'JSON',
             cache: false,
             data: data,
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2564,6 +2599,7 @@ const EditRoomBookingModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2614,6 +2650,9 @@ const CancelRoomBookingModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_order='+id_order+'&action=initCancelRoomBookingModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2626,6 +2665,7 @@ const CancelRoomBookingModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },
@@ -2651,6 +2691,9 @@ const RoomAllotmentCommentModal = {
             dataType: 'JSON',
             cache: false,
             data: 'ajax=true&id_hotel_booking='+idHtlBooking+'&action=initRoomAllotmentCommentModal',
+            beforeSend: function() {
+                $("#page-loader").show();
+            },
             success: function(result) {
                 if (result.hasError == 0 && result.modalHtml) {
                     $('#footer').next('.bootstrap').append(result.modalHtml);
@@ -2663,6 +2706,7 @@ const RoomAllotmentCommentModal = {
             },
             complete: function() {
                 $(".loading_overlay").hide();
+                $("#page-loader").hide();
             }
         });
     },