colour systems, including: RGB, HSL, CMYK, CMS, how each produces colour, their properties, purpose and uses

Using JavaScript to: add interactivity to web pages, including by: inserting JavaScript in HTML, creating and using external scripts, change HTML content: text/number, including calculations and string manipulation, images and image properties, change HTML styles: change style of HTML elements using document.getElementById(id).style.property = new style, show/hide HTML elements using: document.getElementById(id).style.visibility=, document.getElementById(id).style.display=, display data in different ways, including by writing into: an HTML element, using innerHTML, the HTML output using document.write(), an alert box, using window.alert(), the browser console, using console.log(), react to common HTML Events, including: onload, onchange, onclick, onmouseover, onmouseout, onkeydown, provide user interaction using: confirm() and prompt() popups