Implementation: JavaScript Client-side scripting using JavaScript. JavaScript events such as Onmouseover and Onmouseout can be used to ensure that web content responds to the user in real time.

The trend towards significantly faster JavaScript engines is enabling powerful client-side processing on a level that simply wasn't feasible before in browsers.

For Higher Computing Science, learn about JavaScript, the main client-side scripting language used to create, delete and manipulate HTML elements.