Copyright is a form of intellectual property law that protects original works of authorship including websites.
Copyright protects original authorship fixed in tangible form (17 USC sec. 102(a)). For works transmitted online, the copyrightable authorship may consist of text, artwork, photographs, music, audiovisual material (including any sounds), sound recordings, etc.
Title 17, Section 501(a) states in part: Anyone who violates any of the exclusive rights of the copyright owner as provided by sections 106 through 122 or of the author as provided in section 106A(a), or who imports copies into the United States in violation of section 602, is an infringer of the copyright or right of the author, as the case may be.