html 4.01

tell browser what version of html we use with loose standard:
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html/loose.dtd"

tell browser what version of html we use with strict standard:
!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html/strict.dtd"

tell browser what encoding we use:
meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"

how to suit standard:
1. img elements: add alt attribute
2. put inline element in the block element
ex: put img element in the p element
3. tell browser html version
4. tell browser encoding