trismegisto - 4:03 pm on Nov 23, 2003 (gmt 0)

Hi

dcrombie, that’s correct speaking in typographical terms, however, regarding stylesheets, the meaning is different. em’s represent the size of the font specified in that element (or inherited), so, if you specify in a div:

font-size: 12px;

And later in your document you assign to the same div a border in this way:

border: 2em solid #000000;

the border of the div will be 24px, 1em represents 12px as defined earlier in the stylesheet. If you do not specify at all a size for the font, it will depend on the browser stylesheet.