The colorbox pop-up is used in different course formats.
The colorbox creates a 'pop-up' and can display content. It will display based on a class and it uses the href element for the content of the pop-up.
Colorbox js code:
$(".iframe").colorbox({ //Different settings here. });
Element:
<a href='http://google.com' class='iframe'>Click here for colorbox</a>
So the example above creates the homepage of Google in the pop-up.
The “rel” element creates the relation for grouped elements, with previous and next buttons. So say for instance you want all div with class 'test', you can add rel:'test'. Make sure you don't use an id here, because an id should be unique.
Html:
<div class='test'>div1</div> <div class='test'>div2</div> <div class='test'>div3</div>
Javascript:
$(".test").colorbox({ iframe: true, rel: 'test' });
If you don't want other elements you can give a false value to the rel setting.