#sub-nav a#tab-3  span {
background:transparent url(http://group.bmj.com/repository/images/bg-sub-nav-right-on.gif) no-repeat scroll right top;
float:left;
margin:0 5px;
padding:5px 6px 5px 3px;
}

#sub-nav a#tab-3  {
color:#333333;
font-weight:bold;
text-decoration:none;
background:transparent url(http://group.bmj.com/repository/images/bg-sub-nav-left-on.gif) no-repeat scroll left top;
display:block;
float:left;
}