Another box model hack alternative
 

The box model hack is used to fix a rendering problem in pre-IE 6 browsers on PC, where by the border and padding are included in the width of an element, as opposed to added on. A number of CSS-based solutions have been put forward to remedy this, so here's another one which we really like:

padding: 2em;
border: 1em solid green;
width: 20em;
width/**/:/**/ 14em;