.tickercontainer { /* the outer div with the black border */
	width: 337px; 
	height: 32px; 
	margin: 0; 
	padding: 0;
	overflow: hidden; 
}
.tickercontainer .mask { /* that serves as a mask. so you get a sort of padding both left and right */
	position: relative;
	width: 337px;
	overflow: hidden;
}
ul.newsticker { /* that's your list */
	position: relative;
	font: bold 10px Verdana;
	list-style-type: none;
	margin: 0;
	padding: 0;
	left:340px;
}
ul.newsticker li {
	float: left; /* important: display inline gives incorrect results when you check for elem's width */
	margin: 0;
	padding: 0;
	width:40px;
}