diff --git a/src/_h5ai/client/js/inc/ext/preview.js b/src/_h5ai/client/js/inc/ext/preview.js
index da12f9b8..887b307b 100644
--- a/src/_h5ai/client/js/inc/ext/preview.js
+++ b/src/_h5ai/client/js/inc/ext/preview.js
@@ -3,6 +3,7 @@ modulejs.define('ext/preview', ['_', '$', 'core/settings', 'core/resource', 'cor
     var settings = _.extend({
             enabled: true
         }, allsettings.preview);
+    var $window = $(window);
     var template =
             '<div id="pv-overlay" class="noSelection">' +
                 '<div id="pv-content"/>' +
@@ -31,7 +32,6 @@ modulejs.define('ext/preview', ['_', '$', 'core/settings', 'core/resource', 'cor
 
     function adjustSize() {
 
-        var $window = $(window);
         var winWidth = $window.width();
         var winHeight = $window.height();
         var $container = $('#pv-content');
@@ -69,14 +69,14 @@ modulejs.define('ext/preview', ['_', '$', 'core/settings', 'core/resource', 'cor
         $('#pv-content').empty();
         setLabels([]);
         $('#pv-overlay').stop(true, true).fadeIn(200);
-        $(window).on('keydown', onKeydown);
+        $window.on('keydown', onKeydown);
 
         adjustSize();
     }
 
     function onExit() {
 
-        $(window).off('keydown', onKeydown);
+        $window.off('keydown', onKeydown);
         $('#pv-overlay').stop(true, true).fadeOut(200, function () {
             $('#pv-content').empty();
             setLabels([]);
@@ -229,7 +229,7 @@ modulejs.define('ext/preview', ['_', '$', 'core/settings', 'core/resource', 'cor
                 ev.stopImmediatePropagation();
             });
 
-        $(window).on('resize load', adjustSize);
+        $window.on('resize load', adjustSize);
     }
 
 
diff --git a/src/_h5ai/client/js/inc/ext/sort.js b/src/_h5ai/client/js/inc/ext/sort.js
index c3cea557..c2aa9f8f 100644
--- a/src/_h5ai/client/js/inc/ext/sort.js
+++ b/src/_h5ai/client/js/inc/ext/sort.js
@@ -185,25 +185,25 @@ modulejs.define('ext/sort', ['_', '$', 'core/settings', 'core/resource', 'core/e
 
             .find('a.label')
                 .append(template)
-                .click(function (event) {
+                .click(function (ev) {
                     sortItems(0, $(this).hasClass('ascending'));
-                    event.preventDefault();
+                    ev.preventDefault();
                 })
             .end()
 
             .find('a.date')
                 .prepend(template)
-                .click(function (event) {
+                .click(function (ev) {
                     sortItems(1, $(this).hasClass('ascending'));
-                    event.preventDefault();
+                    ev.preventDefault();
                 })
             .end()
 
             .find('a.size')
                 .prepend(template)
-                .click(function (event) {
+                .click(function (ev) {
                     sortItems(2, $(this).hasClass('ascending'));
-                    event.preventDefault();
+                    ev.preventDefault();
                 })
             .end();