MARGINWIDTH: the internal left and right margins for the frame
MARGINHEIGHT: the internal top and bottom margins for the frame
<FRAME ...> sets a single frame in the framed page.
<FRAME ...> always goes inside a <FRAMESET ...> element. The SRC attribute, which is required, indicates the URL of the page that goes in the frame. In most situations you should also use NAME to give the frame a name so that links can target the frame.
For example, this code creates a frameset with two frames.
The first <FRAME ...> loads the file
frame1_title.html into a frame named TITLE.
The second<FRAME ...> loads the file
frame1_body.html into a frame named MAIN.