diff --git a/public/js/icinga/behavior/modal.js b/public/js/icinga/behavior/modal.js
new file mode 100644
index 000000000..1ce0fd05a
--- /dev/null
+++ b/public/js/icinga/behavior/modal.js
@@ -0,0 +1,83 @@
+// Icinga Reporting | (c) 2018 Icinga GmbH | GPLv2
+
+(function (Icinga, $) {
+
+    'use strict';
+
+    var $body;
+    var $overlay;
+
+    function Modal(icinga) {
+        Icinga.EventListener.call(this, icinga);
+
+        $body = $('body');
+        $overlay = $('<div id="modal-overlay"><div id="modal-container"></div></div>');
+
+        $overlay.appendTo($('#layout'));
+
+        this.on('click', '.modal-toggle', this.onModalToggleClick, this);
+    }
+
+    Modal.prototype = new Icinga.EventListener();
+
+    Modal.prototype.block = function () {
+        $body.css('overflow', 'hidden');
+
+        $overlay.addClass('active');
+    };
+
+    Modal.prototype.hide = function () {
+        this.unblock();
+
+        $('document').off('keydown.modal', this.onKeydown);
+
+        $overlay.off('click.modal', this.onOverlayClick);
+    };
+
+    Modal.prototype.onKeydown = function (event) {
+        var modal = event.data.self;
+
+        if (event.which === 27) {
+            modal.hide();
+        }
+    };
+
+    Modal.prototype.onModalToggleClick = function (event) {
+        var modal = event.data.self;
+
+        modal.show();
+    };
+
+    Modal.prototype.onOverlayClick = function (event) {
+        var modal = event.data.self;
+        var $target = $(event.target);
+        var $closeButton = $(event.target).closest('button.close');
+
+        console.log($target);
+
+        if ($target.is('#modal-overlay')) {
+            modal.hide();
+        } else if ($closeButton.length) {
+            modal.hide();
+        }
+    };
+
+    Modal.prototype.show = function () {
+        $(document).on('keydown.modal', { self: this }, this.onKeydown);
+
+        $overlay.on('click.modal', { self: this }, this.onOverlayClick);
+
+        $overlay.addClass('active');
+    };
+
+    Modal.prototype.unblock = function () {
+        $body.css('overflow', '');
+
+        $overlay.removeClass('active');
+    };
+
+    Icinga.Behaviors = Icinga.Behaviors || {};
+
+    Icinga.Behaviors.Modal = Modal;
+
+}(Icinga, jQuery));