#container 
{
  width:920px;
  height:60px;
  overflow: hidden;
  float:left;   
}

#scroller {
  width: 1167px; /* = width + margin left + margin right + padding*2 + border*2  from the content rule */
}

#leftArrow
{
  float:left;   
}

#rightArrow
{
   float:right;
}