.tickercontainer { /* the outer div with the black border */
border: 1px solid #000;
/*background: #fff; */
/*width: 738px; 
height: 27px; */
margin: 0; 
padding: 0;
overflow: hidden;
z-index: 100;
}

.tickercontainer .mask { /* that serves as a mask. so you get a sort of padding both left and right */
position: fixed;
/*left: 10px;*/
/*top: 8px;*/
left:0px;
right:0px;
bottom:0px;
/*width: 718px;*/
overflow: hidden;
background: #ccc;
z-index: 100;
}
ul.newsticker { /* that's your list */
position: relative;
left: 750px;
font: bold 10px Verdana;
list-style-type: none;
margin: 0;
padding: 0;
z-index: 100;
}
ul.newsticker li {
float: left; /* important: display inline gives incorrect results when you check for elem's width */
margin: 0;
padding: 0;
/*background: #ccc;*/
background-color:transparent;
}
ul.newsticker a {
white-space: nowrap;
padding: 0;
color: #ff0000;
font: bold 10px Verdana;
margin: 0 50px 0 0;
} 
ul.newsticker span {
margin: 0 10px 0 0;
}