A class can be used more the once. You're not supposed to give multiple elements the same ID ...

The ID is an attribute that specifies a unique ID for an element. The ID's name or value must be unique in the HTML document. The ID helps to point to a specific style decoration in a CSS file.The ID ...

National 5; Implementation: CSS Using classes with CSS. Cascading Style Sheets (CSS) are used to apply styles to a webpage (internal) or website (external). Understanding the properties of text ...

Ryan Boudreaux continues his tutorial on getting acquainted with jQuery by showing you how to get objects by ID and Class selectors and by Tag and Attribute.