Some elements of a website are copyrighted, which means that it is illegal to copy them without permisison of its copyight owner. This would include any code, audio, images, or even text possessing even a minimal degree of creativity.
A website may also have trademarks (words or images used to identify a business or its products) that you cannot use for identity your own business or products, or create the impression that the trademark owner is sponsoring or endorsing your website) without the trademark owner's permission.
A website may also have trademarks (words or images used to identify a business or its products) that you cannot use for identity your own business or products, or create the impression that the trademark owner is sponsoring or endorsing your website) without the trademark owner's permission.