.u_block_header li a {
    background: url("/themes/default/images/u_block_header.png") repeat-x scroll 0 0 transparent;
}

.u_block_header li.u_block_header_active {
  background: url("/themes/default/images/u_block_header_active.png") repeat-x scroll 0 0 transparent !important;
}

.u_block_header {
  background: url("/themes/default/images/u_block_header.png") repeat-x scroll 0 0 transparent !important;
}