diff --git a/src/backend.csv.js b/src/backend.csv.js
index aacfc5e9..e00aba78 100644
--- a/src/backend.csv.js
+++ b/src/backend.csv.js
@@ -4,10 +4,11 @@ this.recline.Backend.CSV = this.recline.Backend.CSV || {};
 
 // Note that provision of jQuery is optional (it is **only** needed if you use fetch on a remote file)
 (function(my) {
+  "use strict";
   my.__type__ = 'csv';
 
   // use either jQuery or Underscore Deferred depending on what is available
-  var Deferred = _.isUndefined(this.jQuery) ? _.Deferred : jQuery.Deferred;
+  var Deferred = _.isUndefined(window.jQuery) ? _.Deferred : jQuery.Deferred;
 
   // ## fetch
   //
diff --git a/src/backend.dataproxy.js b/src/backend.dataproxy.js
index ffe36792..ae05bf2f 100644
--- a/src/backend.dataproxy.js
+++ b/src/backend.dataproxy.js
@@ -3,6 +3,7 @@ this.recline.Backend = this.recline.Backend || {};
 this.recline.Backend.DataProxy = this.recline.Backend.DataProxy || {};
 
 (function(my) {
+  "use strict";
   my.__type__ = 'dataproxy';
   // URL for the dataproxy
   my.dataproxy_url = '//jsonpdataproxy.appspot.com';
@@ -12,7 +13,7 @@ this.recline.Backend.DataProxy = this.recline.Backend.DataProxy || {};
 
   
   // use either jQuery or Underscore Deferred depending on what is available
-  var Deferred = _.isUndefined(this.jQuery) ? _.Deferred : jQuery.Deferred;
+  var Deferred = _.isUndefined(window.jQuery) ? _.Deferred : jQuery.Deferred;
 
   // ## load
   //
diff --git a/src/backend.elasticsearch.js b/src/backend.elasticsearch.js
index 82ba52de..5d02965f 100644
--- a/src/backend.elasticsearch.js
+++ b/src/backend.elasticsearch.js
@@ -3,10 +3,11 @@ this.recline.Backend = this.recline.Backend || {};
 this.recline.Backend.ElasticSearch = this.recline.Backend.ElasticSearch || {};
 
 (function($, my) {
+  "use strict";
   my.__type__ = 'elasticsearch';
 
   // use either jQuery or Underscore Deferred depending on what is available
-  var Deferred = _.isUndefined(this.jQuery) ? _.Deferred : jQuery.Deferred;
+  var Deferred = _.isUndefined(window.jQuery) ? _.Deferred : jQuery.Deferred;
 
   // ## ElasticSearch Wrapper
   //
@@ -200,8 +201,8 @@ this.recline.Backend.ElasticSearch = this.recline.Backend.ElasticSearch || {};
         fields: fieldData
       });
     })
-    .fail(function(arguments) {
-      dfd.reject(arguments);
+    .fail(function(args) {
+      dfd.reject(args);
     });
     return dfd.promise();
   };
diff --git a/src/backend.gdocs.js b/src/backend.gdocs.js
index 4d18aa9b..27eaee38 100644
--- a/src/backend.gdocs.js
+++ b/src/backend.gdocs.js
@@ -3,10 +3,11 @@ this.recline.Backend = this.recline.Backend || {};
 this.recline.Backend.GDocs = this.recline.Backend.GDocs || {};
 
 (function(my) {
+  "use strict";
   my.__type__ = 'gdocs';
 
   // use either jQuery or Underscore Deferred depending on what is available
-  var Deferred = _.isUndefined(this.jQuery) ? _.Deferred : jQuery.Deferred;
+  var Deferred = _.isUndefined(window.jQuery) ? _.Deferred : jQuery.Deferred;
 
   // ## Google spreadsheet backend
   // 
diff --git a/src/backend.memory.js b/src/backend.memory.js
index 07e14fd6..861a0636 100644
--- a/src/backend.memory.js
+++ b/src/backend.memory.js
@@ -3,10 +3,11 @@ this.recline.Backend = this.recline.Backend || {};
 this.recline.Backend.Memory = this.recline.Backend.Memory || {};
 
 (function(my) {
+  "use strict";
   my.__type__ = 'memory';
 
   // private data - use either jQuery or Underscore Deferred depending on what is available
-  var Deferred = _.isUndefined(this.jQuery) ? _.Deferred : jQuery.Deferred;
+  var Deferred = _.isUndefined(window.jQuery) ? _.Deferred : jQuery.Deferred;
 
   // ## Data Wrapper
   //
diff --git a/src/model.js b/src/model.js
index 1e6e6441..b6a9461a 100644
--- a/src/model.js
+++ b/src/model.js
@@ -3,9 +3,10 @@ this.recline = this.recline || {};
 this.recline.Model = this.recline.Model || {};
 
 (function(my) {
+  "use strict";
 
 // use either jQuery or Underscore Deferred depending on what is available
-var Deferred = _.isUndefined(this.jQuery) ? _.Deferred : jQuery.Deferred;
+var Deferred = _.isUndefined(window.jQuery) ? _.Deferred : jQuery.Deferred;
 
 // ## <a id="dataset">Dataset</a>
 my.Dataset = Backbone.Model.extend({
@@ -298,7 +299,7 @@ my.Record = Backbone.Model.extend({
   //
   // NB: if field is undefined a default '' value will be returned
   getFieldValue: function(field) {
-    val = this.getFieldValueUnrendered(field);
+    var val = this.getFieldValueUnrendered(field);
     if (field && !_.isUndefined(field.renderer)) {
       val = field.renderer(val, field, this.toJSON());
     }
diff --git a/src/view.flot.js b/src/view.flot.js
index b50c6000..c1802218 100644
--- a/src/view.flot.js
+++ b/src/view.flot.js
@@ -4,7 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
-
+  "use strict";
 // ## Graph view for a Dataset using Flot graphing library.
 //
 // Initialization arguments (in a hash in first parameter):
diff --git a/src/view.grid.js b/src/view.grid.js
index 2a6a2b55..f826b76a 100644
--- a/src/view.grid.js
+++ b/src/view.grid.js
@@ -4,6 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 // ## (Data) Grid Dataset View
 //
 // Provides a tabular view on a Dataset.
diff --git a/src/view.map.js b/src/view.map.js
index d6de52fc..1c463882 100644
--- a/src/view.map.js
+++ b/src/view.map.js
@@ -4,7 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
-
+  "use strict";
 // ## Map view for a Dataset using Leaflet mapping library.
 //
 // This view allows to plot gereferenced records on a map. The location
@@ -123,7 +123,7 @@ my.Map = Backbone.View.extend({
   //     }
   infobox: function(record) {
     var html = '';
-    for (key in record.attributes){
+    for (var key in record.attributes){
       if (!(this.state.get('geomField') && key == this.state.get('geomField'))){
         html += '<div><strong>' + key + '</strong>: '+ record.attributes[key] + '</div>';
       }
@@ -172,8 +172,7 @@ my.Map = Backbone.View.extend({
   // Also sets up the editor fields and the map if necessary.
   render: function() {
     var self = this;
-
-    htmls = Mustache.render(this.template, this.model.toTemplateJSON());
+    var htmls = Mustache.render(this.template, this.model.toTemplateJSON());
     $(this.el).html(htmls);
     this.$map = this.el.find('.panel.map');
     this.redraw();
@@ -326,7 +325,7 @@ my.Map = Backbone.View.extend({
     if (!(docs instanceof Array)) docs = [docs];
 
     _.each(docs,function(doc){
-      for (key in self.features._layers){
+      for (var key in self.features._layers){
         if (self.features._layers[key].feature.properties.cid == doc.cid){
           self.features.removeLayer(self.features._layers[key]);
         }
@@ -560,7 +559,7 @@ my.MapMenu = Backbone.View.extend({
   // Also sets up the editor fields and the map if necessary.
   render: function() {
     var self = this;
-    htmls = Mustache.render(this.template, this.model.toTemplateJSON());
+    var htmls = Mustache.render(this.template, this.model.toTemplateJSON());
     $(this.el).html(htmls);
 
     if (this._geomReady() && this.model.fields.length){
diff --git a/src/view.multiview.js b/src/view.multiview.js
index 8542488b..e770d386 100644
--- a/src/view.multiview.js
+++ b/src/view.multiview.js
@@ -5,6 +5,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 // ## MultiView
 //
 // Manage multiple views together along with query editor etc. Usage:
@@ -519,7 +520,7 @@ my.parseQueryString = function(q) {
 
 // Parse the query string out of the URL hash
 my.parseHashQueryString = function() {
-  q = my.parseHashUrl(window.location.hash).query;
+  var q = my.parseHashUrl(window.location.hash).query;
   return my.parseQueryString(q);
 };
 
diff --git a/src/view.slickgrid.js b/src/view.slickgrid.js
index e4780fd8..48d0bad2 100644
--- a/src/view.slickgrid.js
+++ b/src/view.slickgrid.js
@@ -4,6 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 // ## SlickGrid Dataset View
 //
 // Provides a tabular view on a Dataset, based on SlickGrid.
diff --git a/src/view.timeline.js b/src/view.timeline.js
index 87cdabe4..c4c7da69 100644
--- a/src/view.timeline.js
+++ b/src/view.timeline.js
@@ -4,6 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 // turn off unnecessary logging from VMM Timeline
 if (typeof VMM !== 'undefined') {
   VMM.debug = false;
diff --git a/src/widget.facetviewer.js b/src/widget.facetviewer.js
index 396bc8eb..311fa2b0 100644
--- a/src/widget.facetviewer.js
+++ b/src/widget.facetviewer.js
@@ -4,6 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 
 // ## FacetViewer
 //
diff --git a/src/widget.fields.js b/src/widget.fields.js
index 13078d2f..2d490091 100644
--- a/src/widget.fields.js
+++ b/src/widget.fields.js
@@ -20,7 +20,8 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
-
+  "use strict";
+  
 my.Fields = Backbone.View.extend({
   className: 'recline-fields-view', 
   template: ' \
diff --git a/src/widget.filtereditor.js b/src/widget.filtereditor.js
index 665c851b..ee6ea56f 100644
--- a/src/widget.filtereditor.js
+++ b/src/widget.filtereditor.js
@@ -4,6 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 
 my.FilterEditor = Backbone.View.extend({
   className: 'recline-filter-editor well', 
diff --git a/src/widget.queryeditor.js b/src/widget.queryeditor.js
index 891983de..a3e594b1 100644
--- a/src/widget.queryeditor.js
+++ b/src/widget.queryeditor.js
@@ -4,6 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 
 my.QueryEditor = Backbone.View.extend({
   className: 'recline-query-editor', 
diff --git a/src/widget.valuefilter.js b/src/widget.valuefilter.js
index 60c08e65..3b57e296 100644
--- a/src/widget.valuefilter.js
+++ b/src/widget.valuefilter.js
@@ -4,6 +4,7 @@ this.recline = this.recline || {};
 this.recline.View = this.recline.View || {};
 
 (function($, my) {
+  "use strict";
 
 my.ValueFilter = Backbone.View.extend({
   className: 'recline-filter-editor well',