Its a small tooltip library for javascript to help you get tooltip when you hover on text. its uses data attribute. you can use ...

a[data-tooltip]:before { position: absolute; left: 0; top: -40px; background-color: #ff0000; color: #ffffff; height: 30px; line ...

You need to know how to create a web site and use JavaScript. Then you can download tooltiplery.js and tooltiplery.css from this ...

A tooltip is a piece of text that appears when you move your mouse over something in a program. As the name suggests, they were ...