/* TOP LEVEL WIDTH (remove for fixed width) */
.nav li {
	width:auto; /* affects top level menu items only, as nested li elements have width 100% of their ul parent (see .nav ul rules above)*/
	
}

/* TOP LEVEL WIDTH AND MARGINS */
.nav li a {
	width:auto; /* FIXME gives problem in IE6 */
	padding-right: .75em;
	text-indent: .75em;
	padding-left:1em;
}
/* FURTHER TIERS WIDTH AND MARGINS */
.nav li li a {
	width:auto; /* FIXME gives problem in IE6 */
	padding-right: .75em;
	text-indent: .75em;
	overflow: hidden; /* force text to fit within the submenu */
	padding-left:1em;
}

/* TOP LEVEL EXPAND INDICATOR */
.nav li .expand
{
	background-image: url(/www/files/imagenes/menu/menu_arrow_down.gif) !important;
	background-position: center right !important;
	background-repeat: no-repeat !important;
	margin-right: .25em; /* space between right side of top level li and expand indicator */
	padding-right: 1em; /* space between right side of menu text and right side of top level li (needs space for indicator, so probably you want this to be higher than the right margin which is specified above in the rule for '.nav li a') */
	padding-left:1em;
}

/* FURTHER TIERS EXPAND INDICATOR */
.nav li li .expand
{
	background-image: url(/www/files/imagenes/menu/menu_arrow_right.gif) !important;
	background-position: center right !important;
	background-repeat: no-repeat !important;
	margin-right: .25em;
	padding-right: 1em;
	padding-left:1em;
}