Try like this: <script type=”text/javascript”> tinymce.init({ selector: “textarea”, toolbar: “mybutton”, setup: function(editor) { editor.addButton(‘mybutton’, { type: ‘splitbutton’, text: ‘My button’, icon: false, onclick: function() { editor.insertContent(‘Main button’); }, menu: [ {text: ‘Menu item 1’, onclick: function() { tinyMCE.activeEditor.execCommand(“myPopup”, false, { title: ‘Divider’, identifier: ‘divider’ })}}, {text: ‘Menu item 2’, onclick: function() {editor.insertContent(‘Menu item 2’);}} ] … Read more