Some forgotten === conversion

1 files changed, 5 insertions, 5 deletions

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]]);
             }
         }