#main_menu {
  margin:0;
  padding:0;
  list-style:none;
}

#main_menu li {
  display:inline;
  margin:0;
  padding:0;
}

#main_menu li a {
  display:block;
  height:49px;
  float:left;
  background-position:top left;
  background-repeat:no-repeat;
  background-color:#965f41;
  text-decoration:none;
}

#main_menu li a:hover {
  background-position:bottom left;
}

#main_menu li a span { visibility:hidden; }

#main_menu li a.home { width: 159px; background-image:url(../images/nav_home.jpg); }
#main_menu li a.howitworks { width: 146px; background-image:url(../images/nav_howitworks.jpg); }
#main_menu li a.successstories { width: 150px; background-image:url(../images/nav_successstories.jpg); }
#main_menu li a.commonquestions { width: 180px; background-image:url(../images/nav_commonquestions.jpg); }
#main_menu li a.ordernow { width: 179px; background-image:url(../images/nav_ordernow.jpg); }