The web is a dynamic environment where a lot of things happen. Most appropriately, they’re called events. Some of these events, like a user clicking a button or moving the mouse over a link, are of great interest to a JavaScript coder.

1. onClick event: triggered by you as you click the link;
2. onUnload event: triggered by the web browser as it leaves the current web page;
3. onLoad event: triggered by the browser as the new web page content is loaded.

Example specified below

<a href="http://html.net" onclick="alert('Going anywhere? Not so fast!'); return false;">Click Me!</a>