Simbla allows embedding of JavaScript code, by clicking the JavaScript menu item:

The following is an example of JavaScript code embedded in regular HTML file:


Here too, just as in embedding CSS code, you must embed the code without the "Script" tag.

Simbla will add the tags automatically and will embed the code at the end of the HTML Body. 

Please note: If you'd like to embed the code in the HTML Head section, you can do so by using the "Custom Header" option located under the Page --> Page Settings section.