* address - address
* blockquote - block quote
* center - Align the blocks in the lift
* dir - directory list
* div - commonly used block level, also the main tag of css layout
* dl - define list
* fieldset - form control group
* form - interactive form
* h1 - Big Title
* h2 - Subtitle
* h3 - Level 3 title
* h4 - Level 4 title
* h5 - Level 5 title
* h6 - Level 6 title
* hr - Horizontal Dividing Line
* isindex - input prompt
* menu - Menu list
* noframes - frames optional content, (display this block content for browsers that do not support frame* noscript - )
Optional script content (display this content for browsers that do not support script)
* ol - Sort form
* p - paragraph
* pre - Format text
* table - table
* ul - non-sorted list