Most HTML 4.0 elements permitted within the BODY are classified as either block-level elements or inline elements. Block-level elements typically contain inline elements and other block-level elements. When rendered visually, block-level elements usually begin on a new line.

The following are defined as block-level elements in HTML 4.0:

• ADDRESS - Address
• BLOCKQUOTE - Block quotation
• CENTER - Centered block
• DIR - Directory list
• DIV - Generic block-level container
• DL - Definition list
• FIELDSET - Form control group
• FORM - Interactive form
• H1 - Level-one heading
• H2 - Level-two heading
• H3 - Level-three heading
• H4 - Level-four heading
• H5 - Level-five heading
• H6 - Level-six heading
• HR - Horizontal rule
• ISINDEX - Input prompt
• MENU - Menu list
• NOFRAMES - Frames alternate content
• NOSCRIPT - Alternate script content
• OL - Ordered list
• P - Paragraph
• PRE - Preformatted text
• TABLE - Table
• UL - Unordered list

The following elements may also be considered block-level elements since they may contain block-level elements:

• DD - Definition description
• DT - Definition term
• FRAMESET - Frameset
• LI - List item
• TBODY - Table body
• TD - Table data cell
• TFOOT - Table foot
• TH - Table header cell
• THEAD - Table head
• TR - Table row

The following elements may be used as either block-level elements or inline elements. If used as inline elements (e.g., within another inline element or a P), these elements should not contain any block-level elements.

• APPLET - Java applet
• BUTTON - Button
• DEL - Deleted text
• IFRAME - Inline frame
• INS - Inserted text
• MAP - Image map
• OBJECT - Object
• SCRIPT - Client-side script