diff --git a/js/chart.js b/js/chart.js
index 971d57a4c3..72d1a33234 100644
--- a/js/chart.js
+++ b/js/chart.js
@@ -228,12 +228,12 @@ JQPlotChart.prototype.draw = function(data, options) {
     }
 };
 JQPlotChart.prototype.destroy = function() {
-    if (this.plot != null) {
+    if (this.plot !== null) {
         this.plot.destroy();
     }
 };
 JQPlotChart.prototype.redraw = function(options) {
-    if (this.plot != null) {
+    if (this.plot !== null) {
         this.plot.replot(options);
     }
 };
@@ -298,7 +298,7 @@ JQPlotLineChart.prototype.prepareData = function(dataTable) {
         row = data[i];
         for ( var j = 1; j < row.length; j++) {
             retRow = retData[j - 1];
-            if (retRow == null) {
+            if (retRow === null) {
                 retRow = [];
                 retData[j - 1] = retRow;
             }
@@ -378,11 +378,11 @@ JQPlotTimelineChart.prototype.prepareData = function(dataTable) {
         d = row[0];
         for ( var j = 1; j < row.length; j++) {
             retRow = retData[j - 1];
-            if (retRow == null) {
+            if (retRow === null) {
                 retRow = [];
                 retData[j - 1] = retRow;
             }
-            if (d != null) {
+            if (d !== null) {
                 retRow.push([d.getTime(), row[j]]);
             }
         }
diff --git a/js/config.js b/js/config.js
index 26aea4874b..9d24473921 100644
--- a/js/config.js
+++ b/js/config.js
@@ -245,7 +245,7 @@ var validators = {
         }
         // convert PCRE regexp
         var parts = regexp.match(validators._regexp_pcre_extract);
-        var valid = this.value.match(new RegExp(parts[2], parts[3])) != null;
+        var valid = this.value.match(new RegExp(parts[2], parts[3])) !== null;
         return valid ? true : PMA_messages['error_invalid_value'];
     },
     /**
@@ -411,7 +411,7 @@ function validate_field(field, isKeyUp, errors)
     errors[field_id] = [];
     var functions = getFieldValidators(field_id, isKeyUp);
     for (var i = 0; i < functions.length; i++) {
-        var args = functions[i][1] != null
+        var args = functions[i][1] !== null
             ? functions[i][1].slice(0)
             : [];
         args.unshift(isKeyUp);
diff --git a/js/functions.js b/js/functions.js
index 193582471e..48c1848d36 100644
--- a/js/functions.js
+++ b/js/functions.js
@@ -392,7 +392,7 @@ function checkSqlQuery(theForm)
         return true;
     }
     if (isEmpty && typeof(theForm.elements['id_bookmark']) != 'undefined' &&
-            (theForm.elements['id_bookmark'].value != null || theForm.elements['id_bookmark'].value !== '') &&
+            (theForm.elements['id_bookmark'].value !== null || theForm.elements['id_bookmark'].value !== '') &&
             theForm.elements['id_bookmark'].selectedIndex !== 0
             ) {
         return true;
@@ -515,7 +515,7 @@ function checkTableEditForm(theForm, fieldsCnt)
             elm2 = $("#field_" + i + "_3");
             val = parseInt(elm2.val(), 10);
             elm3 = $("#field_" + i + "_1");
-            if (isNaN(val) && elm3.val() != "") {
+            if (isNaN(val) && elm3.val() !== "") {
                 elm2.select();
                 alert(PMA_messages['strNotNumber']);
                 elm2.focus();
@@ -538,7 +538,7 @@ function checkTableEditForm(theForm, fieldsCnt)
     }
 
     // at least this section is under jQuery
-    if ($("input.textfield[name='table']").val() == "") {
+    if ($("input.textfield[name='table']").val() === "") {
         alert(PMA_messages['strFormEmpty']);
         $("input.textfield[name='table']").focus();
         return false;
@@ -1770,7 +1770,7 @@ function PMA_SQLPrettyPrint(string)
     while (! stream.eol()) {
         stream.start = stream.pos;
         token = mode.token(stream, state);
-        if (token != null) {
+        if (token !== null) {
             tokens.push([token, stream.current().toLowerCase()]);
         }
     }
@@ -3455,7 +3455,7 @@ AJAX.registerTeardown('functions.js', function() {
  */
 (function ($) {
     $.fn.noSelect = function (p) { //no select plugin by Paulo P.Marinas
-        var prevent = (p == null) ? true : p;
+        var prevent = (p === null) ? true : p;
         if (prevent) {
             return this.each(function () {
                 if ($.browser.msie || $.browser.safari) {
diff --git a/js/server_status_monitor.js b/js/server_status_monitor.js
index cc0bfef1c3..379c4e0a5e 100644
--- a/js/server_status_monitor.js
+++ b/js/server_status_monitor.js
@@ -960,7 +960,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
             return false;
         }
 
-        if (newChart == null) {
+        if (newChart === null) {
             $('#seriesPreview').html('');
 
             newChart = {
@@ -1027,9 +1027,9 @@ AJAX.registerOnload('server_status_monitor.js', function() {
                 monitorSettings = $.parseJSON(window.localStorage['monitorSettings']);
             }
 
-            $('a[href="#clearMonitorConfig"]').toggle(runtime.charts != null);
+            $('a[href="#clearMonitorConfig"]').toggle(runtime.charts !== null);
 
-            if (runtime.charts != null && monitorProtocolVersion != window.localStorage['monitorVersion']) {
+            if (runtime.charts !== null && monitorProtocolVersion != window.localStorage['monitorVersion']) {
                 $('#emptyDialog').dialog({title: PMA_messages['strIncompatibleMonitorConfig']});
                 $('#emptyDialog').html(PMA_messages['strIncompatibleMonitorConfigDescription']);
 
@@ -1043,10 +1043,10 @@ AJAX.registerOnload('server_status_monitor.js', function() {
             }
         }
 
-        if (runtime.charts == null) {
+        if (runtime.charts === null) {
             runtime.charts = defaultChartGrid;
         }
-        if (monitorSettings == null) {
+        if (monitorSettings === null) {
             monitorSettings = defaultMonitorSettings;
         }
 
@@ -1331,7 +1331,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
             }
         });
 
-        if (chart == null) {
+        if (chart === null) {
             return;
         }
 
@@ -1464,7 +1464,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
                 for (var j = 0; j < elem.nodes.length; j++) {
                     // Update x-axis
                     if (i === 0 && j === 0) {
-                        if (oldChartData == null) {
+                        if (oldChartData === null) {
                             diff = chartData.x - runtime.xmax;
                         } else {
                             diff = parseInt(chartData.x - oldChartData.x, 10);
@@ -1483,7 +1483,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
                             elem.nodes[j].transformFn,
                             chartData[key][j],
                             // Check if first iteration (oldChartData==null), or if newly added chart oldChartData[key]==null
-                            (oldChartData == null || oldChartData[key] == null ? null : oldChartData[key][j])
+                            (oldChartData === null || oldChartData[key] === null ? null : oldChartData[key][j])
                         );
 
                     // Otherwise use original value and apply differential and divisor if given,
@@ -1492,7 +1492,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
                         value = parseFloat(chartData[key][j][0].value);
 
                         if (elem.nodes[j].display == 'differential') {
-                            if (oldChartData == null || oldChartData[key] == null) {
+                            if (oldChartData === null || oldChartData[key] === null) {
                                 continue;
                             }
                             value -= oldChartData[key][j][0].value;
@@ -1576,7 +1576,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
     function chartValueTransform(name, cur, prev) {
         switch(name) {
         case 'cpu-linux':
-            if (prev == null) {
+            if (prev === null) {
                 return undefined;
             }
             // cur and prev are datapoint arrays, but containing
@@ -1590,7 +1590,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
 
         // Query cache efficiency (%)
         case 'qce':
-            if (prev == null) {
+            if (prev === null) {
                 return undefined;
             }
             // cur[0].value is Qcache_hits, cur[1].value is Com_select
@@ -1651,7 +1651,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
         var dlgBtns = {};
 
         dlgBtns[PMA_messages['strCancelRequest']] = function() {
-            if (logRequest != null) {
+            if (logRequest !== null) {
                 logRequest.abort();
             }
 
@@ -1838,7 +1838,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
 
                 // If not required to be hidden, do we need
                 // to hide because of a not matching text filter?
-                if (! hide && (textFilter != null && ! textFilter.exec($t.text()))) {
+                if (! hide && (textFilter !== null && ! textFilter.exec($t.text()))) {
                     hide = true;
                 }
 
@@ -2036,7 +2036,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
             resizable: false,
             buttons: dlgBtns,
             close: function() {
-                if (profilingChart != null) {
+                if (profilingChart !== null) {
                     profilingChart.destroy();
                 }
                 $('#queryAnalyzerDialog div.placeHolder').html('');
@@ -2089,7 +2089,7 @@ AJAX.registerOnload('server_status_monitor.js', function() {
             for (var i = 0, l = data.explain.length; i < l; i++) {
                 explain += '<div class="explain-' + i + '"' + (i>0? 'style="display:none;"' : '' ) + '>';
                 $.each(data.explain[i], function(key, value) {
-                    value = (value == null)?'null':value;
+                    value = (value === null)?'null':value;
 
                     if (key == 'type' && value.toLowerCase() == 'all') {
                         value = '<span class="attention">' + value + '</span>';
diff --git a/js/server_status_variables.js b/js/server_status_variables.js
index a029f6f8c6..48c08d220f 100644
--- a/js/server_status_variables.js
+++ b/js/server_status_variables.js
@@ -89,7 +89,7 @@ AJAX.registerOnload('server_status_variables.js', function() {
 
         odd_row = false;
         $('#serverstatusvariables th.name').each(function() {
-            if ((textFilter == null || textFilter.exec($(this).text()))
+            if ((textFilter === null || textFilter.exec($(this).text()))
                 && (! alertFilter || $(this).next().find('span.attention').length>0)
                 && (categoryFilter.length === 0 || $(this).parent().hasClass('s_' + categoryFilter))
             ) {
diff --git a/js/tbl_select.js b/js/tbl_select.js
index 3b7c9005a4..5f82bb2a0c 100644
--- a/js/tbl_select.js
+++ b/js/tbl_select.js
@@ -85,7 +85,7 @@ AJAX.registerOnload('tbl_select.js', function() {
                 continue;
             }
 
-            if (values['criteriaValues[' + a + ']'] === '' || values['criteriaValues[' + a + ']'] == null) {
+            if (values['criteriaValues[' + a + ']'] === '' || values['criteriaValues[' + a + ']'] === null) {
                 delete values['criteriaValues[' + a + ']'];
                 delete values['criteriaColumnOperators[' + a + ']'];
                 delete values['criteriaColumnNames[' + a + ']'];
@@ -94,7 +94,7 @@ AJAX.registerOnload('tbl_select.js', function() {
             }
         }
         // If all columns are selected, use a single parameter to indicate that
-        if (values['columnsToDisplay[]'] != null) {
+        if (values['columnsToDisplay[]'] !== null) {
             if (values['columnsToDisplay[]'].length == columnCount) {
                 delete values['columnsToDisplay[]'];
                 values['displayAllColumns'] = true;
@@ -106,7 +106,7 @@ AJAX.registerOnload('tbl_select.js', function() {
         $.post($search_form.attr('action'), values, function(data) {
             PMA_ajaxRemoveMessage($msgbox);
             if (data.success === true) {
-                if (data.sql_query != null) { // zero rows
+                if (data.sql_query !== null) { // zero rows
                     $("#sqlqueryresults").html(data.sql_query);
                 } else { // results found
                     $("#sqlqueryresults").html(data.message);