diff --git a/client/modules/IDE/components/Editor.jsx b/client/modules/IDE/components/Editor.jsx
index 892028c4..cfedd841 100644
--- a/client/modules/IDE/components/Editor.jsx
+++ b/client/modules/IDE/components/Editor.jsx
@@ -188,7 +188,7 @@ class Editor extends React.Component {
     for (let i = 0; i < this._cm.lineCount(); i += 1) {
       this._cm.removeLineClass(i, 'background', 'line-runtime-error');
     }
-    if (this.props.runtimeErrorWarningVisible && this._cm.getDoc().modeOption === 'javascript') {
+    if (this.props.runtimeErrorWarningVisible) {
       this.props.consoleEvents.forEach((consoleEvent) => {
         if (consoleEvent.method === 'error') {
           if (consoleEvent.data &&
@@ -197,7 +197,11 @@ class Editor extends React.Component {
             consoleEvent.data[0].indexOf(')') > -1) {
             const n = consoleEvent.data[0].replace(')', '').split(' ');
             const lineNumber = parseInt(n[n.length - 1], 10) - 1;
-            if (!Number.isNaN(lineNumber)) {
+            const { source } = consoleEvent;
+            const fileName = this.props.file.name;
+            const errorFromJavaScriptFile = (`${source}.js` === fileName);
+            const errorFromIndexHTML = ((source === fileName) && (fileName === 'index.html'));
+            if (!Number.isNaN(lineNumber) && (errorFromJavaScriptFile || errorFromIndexHTML)) {
               this._cm.addLineClass(lineNumber, 'background', 'line-runtime-error');
             }
           }
diff --git a/client/utils/consoleUtils.js b/client/utils/consoleUtils.js
index 40ab1843..2f8ea1be 100644
--- a/client/utils/consoleUtils.js
+++ b/client/utils/consoleUtils.js
@@ -46,21 +46,36 @@ export const startTag = '@fs-';
 
 export const getAllScriptOffsets = (htmlFile) => {
   const offs = [];
-  let found = true;
+  const hijackConsoleErrorsScriptLength = 36;
+  const embeddedJSStart = 'script crossorigin=""';
+  let foundJSScript = true;
+  let foundEmbeddedJS = true;
   let lastInd = 0;
   let ind = 0;
   let endFilenameInd = 0;
   let filename = '';
   let lineOffset = 0;
-  while (found) {
+  while (foundJSScript) {
     ind = htmlFile.indexOf(startTag, lastInd);
     if (ind === -1) {
-      found = false;
+      foundJSScript = false;
     } else {
       endFilenameInd = htmlFile.indexOf('.js', ind + startTag.length + 3);
       filename = htmlFile.substring(ind + startTag.length, endFilenameInd);
-      // the length of hijackConsoleErrorsScript is 36 lines
-      lineOffset = htmlFile.substring(0, ind).split('\n').length + 36;
+      lineOffset = htmlFile.substring(0, ind).split('\n').length + hijackConsoleErrorsScriptLength;
+      offs.push([lineOffset, filename]);
+      lastInd = ind + 1;
+    }
+  }
+  lastInd = 0;
+  while (foundEmbeddedJS) {
+    ind = htmlFile.indexOf(embeddedJSStart, lastInd);
+    if (ind === -1) {
+      foundEmbeddedJS = false;
+    } else {
+      filename = 'index.html';
+      // not sure where the offset of 25 comes from
+      lineOffset = htmlFile.substring(0, ind).split('\n').length + 25;
       offs.push([lineOffset, filename]);
       lastInd = ind + 1;
     }