a.menu-503, ul.links li.menu-503 a {
  background-image: url(/sites/default/files/styles/menu_icon/public/sites/all/themes/flossie2013/images/twitter-icon.png);
  padding-left:35px;
  background-repeat: no-repeat;
  background-position: left;
  height: 35px;
}

a.menu-504, ul.links li.menu-504 a {
  background-image: url(/sites/default/files/styles/menu_icon/public/menu_icons/menu_icon_504.png);
  padding-left:35px;
  background-repeat: no-repeat;
  background-position: left;
  height: 35px;
}