ul.tristate {
	list-style:none;
	padding:0;
	margin:0;
	list-style-position: inside;	
}

ul.tristate a.checkbox {
	background: url(../images/3-state-checkbox.gif) 0 0 no-repeat;
	display: block;
	float: left;
	height: 13px;
	overflow: hidden;
	text-indent: -999em;
	width: 13px;
	display:inline;
	padding:0;
}

ul.tristate ul li a.checkbox { margin-left: 2px; _margin-left: 3px;}
ul.tristate a.checked { background-position: 0 -13px; }
ul.tristate a.partial { background-position: 0 -26px; }