diff --git a/apps/files_external/js/settings.js b/apps/files_external/js/settings.js
index 00d2a920cbf8077e8820fc36012ef3382fc3ff18..75d45ae19247151553771cd73e44700b197d6e9b 100644
--- a/apps/files_external/js/settings.js
+++ b/apps/files_external/js/settings.js
@@ -19,28 +19,28 @@ function getSelection($row) {
 	return values;
 }
 
-function highlightBorder(element, highlight) {
-	$(element).toggleClass('warning-input', highlight);
+function highlightBorder($element, highlight) {
+	$element.toggleClass('warning-input', highlight);
 	return highlight;
 }
 
-function highlightInput(input) {
-	if ($(input).attr('type') === 'text' || $(input).attr('type') === 'password') {
-		return highlightBorder(input,
-			($(input).val() === '' && !$(input).hasClass('optional')));
+function highlightInput($input) {
+	if ($input.attr('type') === 'text' || $input.attr('type') === 'password') {
+		return highlightBorder($input,
+			($input.val() === '' && !$input.hasClass('optional')));
 	}
 }
 
 OC.MountConfig={
-	saveStorage:function(tr, callback) {
-		var mountPoint = $(tr).find('.mountPoint input').val();
-		var oldMountPoint = $(tr).find('.mountPoint input').data('mountpoint');
+	saveStorage:function($tr, callback) {
+		var mountPoint = $tr.find('.mountPoint input').val();
+		var oldMountPoint = $tr.find('.mountPoint input').data('mountpoint');
 		if (mountPoint === '') {
 			return false;
 		}
-		var statusSpan = $(tr).closest('tr').find('.status span');
-		var backendClass = $(tr).find('.backend').data('class');
-		var configuration = $(tr).find('.configuration input');
+		var statusSpan = $tr.find('.status span');
+		var backendClass = $tr.find('.backend').data('class');
+		var configuration = $tr.find('.configuration input');
 		var addMountPoint = true;
 		if (configuration.length < 1) {
 			return false;
@@ -62,14 +62,14 @@ OC.MountConfig={
 			}
 		});
 		if ($('#externalStorage').data('admin') === true) {
-			var multiselect = getSelection($(tr));
+			var multiselect = getSelection($tr);
 		}
 		if (addMountPoint) {
 			var status = false;
 			if ($('#externalStorage').data('admin') === true) {
 				var isPersonal = false;
-				var oldGroups = $(tr).find('.applicable').data('applicable-groups');
-				var oldUsers = $(tr).find('.applicable').data('applicable-users');
+				var oldGroups = $tr.find('.applicable').data('applicable-groups');
+				var oldUsers = $tr.find('.applicable').data('applicable-users');
 				var groups = [];
 				var users = [];
 				$.each(multiselect, function(index, value) {
@@ -102,7 +102,7 @@ OC.MountConfig={
 							oldMountPoint: oldMountPoint
 						},
 						success: function(result) {
-							$(tr).find('.mountPoint input').data('mountpoint', mountPoint);
+							$tr.find('.mountPoint input').data('mountpoint', mountPoint);
 							status = updateStatus(statusSpan, result);
 							if (callback) {
 								callback(status);
@@ -116,8 +116,8 @@ OC.MountConfig={
 						}
 					});
 				});
-				$(tr).find('.applicable').data('applicable-groups', groups);
-				$(tr).find('.applicable').data('applicable-users', users);
+				$tr.find('.applicable').data('applicable-groups', groups);
+				$tr.find('.applicable').data('applicable-users', users);
 				var mountType = 'group';
 				$.each(oldGroups, function(index, applicable) {
 					$.ajax({type: 'POST',
@@ -163,7 +163,7 @@ OC.MountConfig={
 						oldMountPoint: oldMountPoint
 					},
 					success: function(result) {
-						$(tr).find('.mountPoint input').data('mountpoint', mountPoint);
+						$tr.find('.mountPoint input').data('mountpoint', mountPoint);
 						status = updateStatus(statusSpan, result);
 						if (callback) {
 							callback(status);
@@ -183,20 +183,23 @@ OC.MountConfig={
 };
 
 $(document).ready(function() {
+	var $externalStorage = $('#externalStorage');
+
 	//initialize hidden input field with list of users and groups
-	$('#externalStorage').find('tr:not(#addMountPoint)').each(function(i,tr) {
-		var applicable = $(tr).find('.applicable');
-		if (applicable.length > 0) {
-			var groups = applicable.data('applicable-groups');
+	$externalStorage.find('tr:not(#addMountPoint)').each(function(i,tr) {
+		var $tr = $(tr);
+		var $applicable = $tr.find('.applicable');
+		if ($applicable.length > 0) {
+			var groups = $applicable.data('applicable-groups');
 			var groupsId = [];
 			$.each(groups, function () {
-				groupsId.push(this+"(group)");
+				groupsId.push(this + '(group)');
 			});
-			var users = applicable.data('applicable-users');
+			var users = $applicable.data('applicable-users');
 			if (users.indexOf('all') > -1) {
-				$(tr).find('.applicableUsers').val('');
+				$tr.find('.applicableUsers').val('');
 			} else {
-				$(tr).find('.applicableUsers').val(groupsId.concat(users).join(','));
+				$tr.find('.applicableUsers').val(groupsId.concat(users).join(','));
 			}
 		}
 	});
@@ -221,7 +224,7 @@ $(document).ready(function() {
 						};
 					},
 					results: function (data, page) {
-						if (data.status === "success") {
+						if (data.status === 'success') {
 
 							var results = [];
 							var userCount = 0; // users is an object
@@ -256,10 +259,10 @@ $(document).ready(function() {
 						type: 'POST',
 						contentType: 'application/json',
 						data: JSON.stringify(users),
-						dataType: "json"
+						dataType: 'json'
 					}).done(function(data) {
 						var results = [];
-						if (data.status === "success") {
+						if (data.status === 'success') {
 							$.each(data.users, function(user, displayname) {
 								if (displayname !== false) {
 									results.push({name:user, displayname:displayname, type:'user'});
@@ -294,9 +297,9 @@ $(document).ready(function() {
 					}
 				},
 				escapeMarkup: function (m) { return m; } // we escape the markup in formatResult and formatSelection
-			}).on("select2-loaded", function() {
-				$.each($(".avatardiv"), function(i, div) {
-					$div = $(div);
+			}).on('select2-loaded', function() {
+				$.each($('.avatardiv'), function(i, div) {
+					var $div = $(div);
 					if ($div.data('type') === 'user') {
 						$div.avatar($div.data('name'),32);
 					}
@@ -306,21 +309,21 @@ $(document).ready(function() {
 	}
 	addSelect2($('tr:not(#addMountPoint) .applicableUsers'));
 	
-	$('#externalStorage').on('change', '#selectBackend', function() {
-		var tr = $(this).closest("tr");
-		$('#externalStorage tbody').append($(tr).clone());
-		$('#externalStorage tbody tr').last().find('.mountPoint input').val('');
+	$externalStorage.on('change', '#selectBackend', function() {
+		var $tr = $(this).closest('tr');
+		$externalStorage.find('tbody').append($tr.clone());
+		$externalStorage.find('tbody tr').last().find('.mountPoint input').val('');
 		var selected = $(this).find('option:selected').text();
 		var backendClass = $(this).val();
-		$(tr).find('.backend').text(selected);
-		if ($(tr).find('.mountPoint input').val() === '') {
-			$(tr).find('.mountPoint input').val(suggestMountPoint(selected));
+		$tr.find('.backend').text(selected);
+		if ($tr.find('.mountPoint input').val() === '') {
+			$tr.find('.mountPoint input').val(suggestMountPoint(selected));
 		}
-		$(tr).addClass(backendClass);
-		$(tr).find('.status').append('<span></span>');
-		$(tr).find('.backend').data('class', backendClass);
+		$tr.addClass(backendClass);
+		$tr.find('.status').append('<span></span>');
+		$tr.find('.backend').data('class', backendClass);
 		var configurations = $(this).data('configurations');
-		var td = $(tr).find('td.configuration');
+		var $td = $tr.find('td.configuration');
 		$.each(configurations, function(backend, parameters) {
 			if (backend === backendClass) {
 				$.each(parameters['configuration'], function(parameter, placeholder) {
@@ -342,20 +345,20 @@ $(document).ready(function() {
 						newElement = $('<input type="text" class="added' + class_string + '" data-parameter="'+parameter+'" placeholder="'+placeholder+'" />');
 					}
 					highlightInput(newElement);
-					td.append(newElement);
+					$td.append(newElement);
 				});
-				if (parameters['custom'] && $('#externalStorage tbody tr.'+backendClass.replace(/\\/g, '\\\\')).length === 1) {
+				if (parameters['custom'] && $externalStorage.find('tbody tr.'+backendClass.replace(/\\/g, '\\\\')).length === 1) {
 					OC.addScript('files_external', parameters['custom']);
 				}
-				td.children().not('[type=hidden]').first().focus();
+				$td.children().not('[type=hidden]').first().focus();
 				return false;
 			}
 		});
-		$(tr).find('td').last().attr('class', 'remove');
-		$(tr).find('td').last().removeAttr('style');
-		$(tr).removeAttr('id');
+		$tr.find('td').last().attr('class', 'remove');
+		$tr.find('td').last().removeAttr('style');
+		$tr.removeAttr('id');
 		$(this).remove();
-		addSelect2($('tr:not(#addMountPoint) .applicableUsers'));
+		addSelect2($tr.find('.applicableUsers'));
 	});
 
 	function suggestMountPoint(defaultMountPoint) {
@@ -369,7 +372,7 @@ $(document).ready(function() {
 		var match = true;
 		while (match && i < 20) {
 			match = false;
-			$('#externalStorage tbody td.mountPoint input').each(function(index, mountPoint) {
+			$externalStorage.find('tbody td.mountPoint input').each(function(index, mountPoint) {
 				if ($(mountPoint).val() === defaultMountPoint+append) {
 					match = true;
 					return false;
@@ -385,54 +388,54 @@ $(document).ready(function() {
 		return defaultMountPoint+append;
 	}
 
-	$('#externalStorage').on('paste', 'td input', function() {
-		var tr = $(this).closest("tr");
-		var me = this;
+	$externalStorage.on('paste', 'td input', function() {
+		var $me = $(this);
+		var $tr = $me.closest('tr');
 		setTimeout(function() {
-			highlightInput($(me));
-			OC.MountConfig.saveStorage(tr);
+			highlightInput($me);
+			OC.MountConfig.saveStorage($tr);
 		}, 20);
 	});
 
 	var timer;
 
-	$('#externalStorage').on('keyup', 'td input', function() {
+	$externalStorage.on('keyup', 'td input', function() {
 		clearTimeout(timer);
-		var tr = $(this).closest("tr");
+		var $tr = $(this).closest('tr');
 		highlightInput($(this));
 		if ($(this).val) {
 			timer = setTimeout(function() {
-				OC.MountConfig.saveStorage(tr);
+				OC.MountConfig.saveStorage($tr);
 			}, 2000);
 		}
 	});
 
-	$('#externalStorage').on('change', 'td input:checkbox', function() {
-		OC.MountConfig.saveStorage($(this).closest("tr"));
+	$externalStorage.on('change', 'td input:checkbox', function() {
+		OC.MountConfig.saveStorage($(this).closest('tr'));
 	});
 
-	$('#externalStorage').on('change', '.applicable', function() {
-		OC.MountConfig.saveStorage($(this).closest("tr"));
+	$externalStorage.on('change', '.applicable', function() {
+		OC.MountConfig.saveStorage($(this).closest('tr'));
 	});
 
-	$('#externalStorage').on('click', '.status>span', function() {
-		OC.MountConfig.saveStorage($(this).closest("tr"));
+	$externalStorage.on('click', '.status>span', function() {
+		OC.MountConfig.saveStorage($(this).closest('tr'));
 	});
 
 	$('#sslCertificate').on('click', 'td.remove>img', function() {
-		var $tr = $(this).closest("tr");
+		var $tr = $(this).closest('tr');
 		$.post(OC.filePath('files_external', 'ajax', 'removeRootCertificate.php'), {cert: $tr.attr('id')});
 		$tr.remove();
 		return true;
 	});
 
-	$('#externalStorage').on('click', 'td.remove>img', function() {
-		var tr = $(this).closest('tr');
-		var mountPoint = $(tr).find('.mountPoint input').val();
+	$externalStorage.on('click', 'td.remove>img', function() {
+		var $tr = $(this).closest('tr');
+		var mountPoint = $tr.find('.mountPoint input').val();
 
-		if ($('#externalStorage').data('admin') === true) {
+		if ($externalStorage.data('admin') === true) {
 			var isPersonal = false;
-			var multiselect = getSelection($(tr));
+			var multiselect = getSelection($tr);
 			$.each(multiselect, function(index, value) {
 				var pos = value.indexOf('(group)');
 				if (pos != -1) {
@@ -450,10 +453,11 @@ $(document).ready(function() {
 			var isPersonal = true;
 			$.post(OC.filePath('files_external', 'ajax', 'removeMountPoint.php'), { mountPoint: mountPoint, mountType: mountType, applicable: applicable, isPersonal: isPersonal });
 		}
-		$(tr).remove();
+		$tr.remove();
 	});
 
-	$('#allowUserMounting').bind('change', function() {
+	var $allowUserMounting = $('#allowUserMounting');
+	$allowUserMounting.bind('change', function() {
 		OC.msg.startSaving('#userMountingMsg');
 		if (this.checked) {
 			OC.AppConfig.setValue('files_external', 'allow_user_mounting', 'yes');
@@ -475,8 +479,8 @@ $(document).ready(function() {
 
 		// disable allowUserMounting
 		if(userMountingBackends.length === 0) {
-			$('#allowUserMounting').prop('checked', false);
-			$('#allowUserMounting').trigger('change');
+			$allowUserMounting.prop('checked', false);
+			$allowUserMounting.trigger('change');
 
 		}
 	});