name value meaning
src "URL" specifies the address of the initial content for the inline frame
name "string" assigns a name to the inline frame, for use in target attribute
longdesc "URL" refers to a document containing a description (not supported yet)
width number of pixels or percentage (e.g. "20%") width of the inline frame
height height of the inline frame
align "top" aligns the inline frame vertically on the top of the surrounding content on its left and right
"bottom" aligns the inline frame vertically on the bottom of the surrounding content on its left and right
"middle" aligns the center of the inline frame vertically with the cureent baseline
"left" places the inline frame at the left margin so that subsequent page content flows on the right of it
"right" places the inline frame at the right margin so that subsequent page content flows on the left of it
frameborder "1" specifies that a border is to appear around the frame; this is the default
"0" suppresses the border
marginwidth number of pixels size of the top and bottom margin inside the inline frame
marginheight size of the left and right margin inside the inline frame
scrolling "auto" scrollbars appear if and only if they are needed to see all the content; this is the default
"yes" scrollbars appear in any case
"no" scrollbars do not appear, which may cause part of the content to be inaccessible.

Note: Internet Explorer uses fairly large default values for marginheight and marginwidth. For some odd reason, if you set one of them, the other is set to zero, so it is best to set both of them.

In addition, the core attributes can be used.