diff --git a/jsedit.cpp b/jsedit.cpp
index aff5f81..05978ad 100644
--- a/jsedit.cpp
+++ b/jsedit.cpp
@@ -54,6 +54,7 @@ protected:
 private:
     QSet<QString> m_keywords;
     QSet<QString> m_knownIds;
+    QSet<QString> m_customIds;
     QHash<JSEdit::ColorComponent, QColor> m_colors;
     QString m_markString;
     Qt::CaseSensitivity m_markCaseSensitivity;
@@ -73,6 +74,7 @@ JSHighlighter::JSHighlighter(QTextDocument *parent)
     m_colors[JSEdit::Keyword]    = QColor("#000080");
     m_colors[JSEdit::BuiltIn]    = QColor("#008080");
     m_colors[JSEdit::Marker]     = QColor("#ffff00");
+    m_colors[JSEdit::Custom]     = QColor("#ff00ff");
 
     // https://developer.mozilla.org/en/JavaScript/Reference/Reserved_Words
     m_keywords << "break";
@@ -248,6 +250,27 @@ JSHighlighter::JSHighlighter(QTextDocument *parent)
     m_knownIds << "window";
     m_knownIds << "navigator";
     m_knownIds << "userAgent";
+
+    //Custom objects
+    m_customIds << "host";
+    m_customIds << "can";
+    m_customIds << "isotp";
+    m_customIds << "uds";
+    //Custom callback functions
+    m_customIds << "setup";
+    m_customIds << "tick";
+    m_customIds << "gotCANFrame";
+    m_customIds << "gotISOTPMessage";
+    m_customIds << "gotUDSMessage";
+    //Custom functions
+    m_customIds << "setTickInterval";
+    m_customIds << "log";    //Duplicate
+    m_customIds << "addParameter";
+    m_customIds << "setFilter";
+    m_customIds << "clearFilters";
+    m_customIds << "sendFrame";
+    m_customIds << "sendISOTP";
+    m_customIds << "sendUDS";
 }
 
 void JSHighlighter::setColor(JSEdit::ColorComponent component, const QColor &color)
@@ -269,6 +292,7 @@ void JSHighlighter::highlightBlock(const QString &text)
     };
 
     QList<int> bracketPositions;
+    QString previousToken;
 
     int blockState = previousBlockState();
     int bracketLevel = blockState >> 4;
@@ -336,10 +360,17 @@ void JSHighlighter::highlightBlock(const QString &text)
         case Identifier:
             if (ch.isSpace() || !(ch.isDigit() || ch.isLetter() || ch == '_')) {
                 QString token = text.mid(start, i - start).trimmed();
-                if (m_keywords.contains(token))
+                if (m_customIds.contains(token) && m_customIds.contains(previousToken)) {
+                    setFormat(start, i - start, m_colors[JSEdit::Custom]);
+                } else if (m_keywords.contains(token)) {
                     setFormat(start, i - start, m_colors[JSEdit::Keyword]);
-                else if (m_knownIds.contains(token))
+                } else if (m_knownIds.contains(token)) {
                     setFormat(start, i - start, m_colors[JSEdit::BuiltIn]);
+                    if (ch == '.') previousToken = token;
+                } else if (m_customIds.contains(token)) {
+                    setFormat(start, i - start, m_colors[JSEdit::Custom]);
+                    if (ch == '.') previousToken = token;
+                }
                 state = Start;
             } else {
                 ++i;