#nav-main ul li#home a { background: transparent url("images/nav-home.gif") no-repeat left center; height: 20px; }
#nav-main ul li#home a:hover, #nav-main ul li#home-selected { background: transparent url("images/nav-home-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#about a { background: transparent url("images/nav-about.gif") no-repeat left center; height: 20px; }
#nav-main ul li#about a:hover, #nav-main ul li#about-selected { background: transparent url("images/nav-about-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#programmes a { background: #0a55a3 url("images/nav-programmes.gif") no-repeat left center; height: 20px; }
#nav-main ul li#programmes a:hover, #nav-main ul li#programmes-selected { background: #0a55a3 url("images/nav-programmes-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#animal-welfare a { background: #0a55a3 url("images/nav-animal-welfare.gif") no-repeat left center; height: 20px; }
#nav-main ul li#animal-welfare a:hover, #nav-main ul li#animal-welfare-selected { background: #0a55a3 url("images/nav-animal-welfare-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#history a { background: #0a55a3 url("images/nav-history.gif") no-repeat left center; height: 34px; }
#nav-main ul li#history a:hover, #nav-main ul li#history-selected { background: #0a55a3 url("images/nav-history-hover.gif") no-repeat left center; height: 34px; }

#nav-main ul li#highlights a { background: #0a55a3 url("images/nav-highlights.gif") no-repeat left center; height: 20px; }
#nav-main ul li#highlights a:hover, #nav-main ul li#highlights-selected { background: #0a55a3 url("images/nav-highlights-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#support a { background: transparent url("images/nav-support.gif") no-repeat left center; height: 20px; }
#nav-main ul li#support a:hover, #nav-main ul li#support-selected { background: transparent url("images/nav-support-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#member a { background: #0a55a3 url("images/nav-member.gif") no-repeat left center; height: 20px; }
#nav-main ul li#member a:hover, #nav-main ul li#member-selected { background: #0a55a3 url("images/nav-member-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#donation a { background: #0a55a3 url("images/nav-donation.gif") no-repeat left center; height: 20px; }
#nav-main ul li#donation a:hover, #nav-main ul li#donation-selected { background: #0a55a3 url("images/nav-donation-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#leave-legacy a { background: #0a55a3 url("images/nav-leave-legacy.gif") no-repeat left center; height: 20px; }
#nav-main ul li#leave-legacy a:hover, #nav-main ul li#leave-legacy-selected { background: #0a55a3 url("images/nav-leave-legacy-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#gift-and-cards a { background: #0a55a3 url("images/nav-gift-and-cards.gif") no-repeat left center; height: 20px; }
#nav-main ul li#gift-and-cards a:hover, #nav-main ul li#gift-and-cards-selected { background: #0a55a3 url("images/nav-gift-and-cards-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#news a { background: transparent url("images/nav-news.gif") no-repeat left center; height: 20px; }
#nav-main ul li#news a:hover, #nav-main ul li#news-selected { background: transparent url("images/nav-news-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#latest-news a { background: #0a55a3 url("images/nav-latest-news.gif") no-repeat left center; height: 20px; }
#nav-main ul li#latest-news a:hover, #nav-main ul li#latest-news-selected { background: #0a55a3 url("images/nav-latest-news-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#press-releases a { background: #0a55a3 url("images/nav-press-releases.gif") no-repeat left center; height: 20px; }
#nav-main ul li#press-releases a:hover, #nav-main ul li#press-releases-selected { background: #0a55a3 url("images/nav-press-releases-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#forthcoming-events a { background: #0a55a3 url("images/nav-forthcoming-events.gif") no-repeat left center; height: 20px; }
#nav-main ul li#forthcoming-events a:hover, #nav-main ul li#forthcoming-events-selected { background: #0a55a3 url("images/nav-forthcoming-events-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#links-news-events a { background: #0a55a3 url("images/nav-links-news-events.gif") no-repeat left center; height: 20px; }
#nav-main ul li#links-news-events a:hover, #nav-main ul li#links-news-events-selected { background: #0a55a3 url("images/nav-links-news-events-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#grants a { background: transparent url("images/nav-grants.gif") no-repeat left center; height: 20px; }
#nav-main ul li#grants a:hover, #nav-main ul li#grants-selected { background: transparent url("images/nav-grants-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#research-fellowship a { background: #0a55a3 url("images/nav-research-fellowship.gif") no-repeat left center; height: 20px; }
#nav-main ul li#research-fellowship a:hover, #nav-main ul li#research-fellowship-selected { background: #0a55a3 url("images/nav-research-fellowship-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#research-scholarship a { background: #0a55a3 url("images/nav-research-scholarship.gif") no-repeat left center; height: 20px; }
#nav-main ul li#research-scholarship a:hover, #nav-main ul li#research-scholarship-selected { background: #0a55a3 url("images/nav-research-scholarship-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#vacation-scholarship a { background: #0a55a3 url("images/nav-vacation-scholarship.gif") no-repeat left center; height: 20px; }
#nav-main ul li#vacation-scholarship a:hover, #nav-main ul li#vacation-scholarship-selected { background: #0a55a3 url("images/nav-vacation-scholarship-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#research-awards a { background: #0a55a3 url("images/nav-research-awards.gif") no-repeat left center; height: 20px; }
#nav-main ul li#research-awards a:hover, #nav-main ul li#research-awards-selected { background: #0a55a3 url("images/nav-research-awards-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#pt-awards a { background: #0a55a3 url("images/nav-pt-awards.gif") no-repeat left center; height: 20px; }
#nav-main ul li#pt-awards a:hover, #nav-main ul li#pt-awards-selected { background: #0a55a3 url("images/nav-pt-awards-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#research-studentship a { background: #0a55a3 url("images/nav-research-studentship.gif") no-repeat left center; height: 20px; }
#nav-main ul li#research-studentship a:hover, #nav-main ul li#research-studentship-selected { background: #0a55a3 url("images/nav-research-studentship-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#fund-awards a { background: #0a55a3 url("images/nav-fund-awards.gif") no-repeat left center; height: 20px; }
#nav-main ul li#fund-awards a:hover, #nav-main ul li#fund-awards-selected { background: #0a55a3 url("images/nav-fund-awards-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#waw-award a { background: #0a55a3 url("images/nav-waw-award.gif") no-repeat left center; height: 20px; }
#nav-main ul li#waw-award a:hover, #nav-main ul li#waw-award-selected { background: #0a55a3 url("images/nav-waw-award-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#public a { background: transparent url("images/nav-public.gif") no-repeat left center; height: 20px; }
#nav-main ul li#public a:hover, #nav-main ul li#public-selected { background: transparent url("images/nav-public-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#public-list a { background: #0a55a3 url("images/nav-public-list.gif") no-repeat left center; height: 20px; }
#nav-main ul li#public-list a:hover, #nav-main ul li#public-list-selected { background: #0a55a3 url("images/nav-public-list-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#online-public a { background: #0a55a3 url("images/nav-online-public.gif") no-repeat left center; height: 20px; }
#nav-main ul li#online-public a:hover, #nav-main ul li#online-public-selected { background: #0a55a3 url("images/nav-online-public-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#aw-series a { background: #0a55a3 url("images/nav-aw-series.gif") no-repeat left center; height: 34px; }
#nav-main ul li#aw-series a:hover, #nav-main ul li#aw-series-selected { background: #0a55a3 url("images/nav-aw-series-hover.gif") no-repeat left center; height: 34px; }

#nav-main ul li#animal a { background: transparent url("images/nav-animal.gif") no-repeat left center; height: 20px; }
#nav-main ul li#animal a:hover, #nav-main ul li#animal-selected { background: transparent url("images/nav-animal-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#subscribers a { background: #0a55a3 url("images/nav-subscribers.gif") no-repeat left center; height: 20px; }
#nav-main ul li#subscribers a:hover, #nav-main ul li#subscribers-selected { background: #0a55a3 url("images/nav-subscribers-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#subscription-rates a { background: #0a55a3 url("images/nav-subscription-rates.gif") no-repeat left center; height: 20px; }
#nav-main ul li#subscription-rates a:hover, #nav-main ul li#subscription-rates-selected { background: #0a55a3 url("images/nav-subscription-rates-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#instructions-authors a { background: #0a55a3 url("images/nav-instructions-authors.gif") no-repeat left center; height: 20px; }
#nav-main ul li#instructions-authors a:hover, #nav-main ul li#instructions-authors-selected { background: #0a55a3 url("images/nav-instructions-authors-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#contents-pages a { background: #0a55a3 url("images/nav-contents-pages.gif") no-repeat left center; height: 20px; }
#nav-main ul li#contents-pages a:hover, #nav-main ul li#contents-pages-selected { background: #0a55a3 url("images/nav-contents-pages-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#recent-reports a { background: #0a55a3 url("images/nav-recent-reports.gif") no-repeat left center; height: 20px; }
#nav-main ul li#recent-reports a:hover, #nav-main ul li#recent-reports-selected { background: #0a55a3 url("images/nav-recent-reports-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#search-contents a { background: #0a55a3 url("images/nav-search-contents.gif") no-repeat left center; height: 20px; }
#nav-main ul li#search-contents a:hover, #nav-main ul li#search-contents-selected { background: #0a55a3 url("images/nav-search-contents-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#supplement a { background: #0a55a3 url("images/nav-supplement.gif") no-repeat left center; height: 34px; }
#nav-main ul li#supplement a:hover, #nav-main ul li#supplement-selected { background: #0a55a3 url("images/nav-supplement-hover.gif") no-repeat left center; height: 34px; }

#nav-main ul li#special-issue1 a { background: #0a55a3 url("images/nav-special-issue1.gif") no-repeat left center; height: 34px; }
#nav-main ul li#special-issue1 a:hover, #nav-main ul li#special-issue1-selected { background: #0a55a3 url("images/nav-special-issue1-hover.gif") no-repeat left center; height: 34px; }

#nav-main ul li#employment a { background: transparent url("images/nav-employment.gif") no-repeat left center; height: 20px; }
#nav-main ul li#employment a:hover, #nav-main ul li#employment-selected { background: transparent url("images/nav-employment-hover.gif") no-repeat left center; height: 20px; }

<br />
<b>Warning</b>:  getimagesize(): Read error! in <b>/web/sites/user/3/61/46035/public/www/menu.css.php</b> on line <b>11</b><br />
#nav-main ul li#space a { background: transparent url("images/") no-repeat left center; height: px; }
#nav-main ul li#space a:hover, #nav-main ul li#space-selected { background: transparent url("images/") no-repeat left center; height: px; }

#nav-main ul li#contact a { background: transparent url("images/nav-contact.gif") no-repeat left center; height: 20px; }
#nav-main ul li#contact a:hover, #nav-main ul li#contact-selected { background: transparent url("images/nav-contact-hover.gif") no-repeat left center; height: 20px; }

#nav-main ul li#links a { background: transparent url("images/nav-links.gif") no-repeat left center; height: 20px; }
#nav-main ul li#links a:hover, #nav-main ul li#links-selected { background: transparent url("images/nav-links-hover.gif") no-repeat left center; height: 20px; }

<br />
<b>Warning</b>:  getimagesize(): Read error! in <b>/web/sites/user/3/61/46035/public/www/menu.css.php</b> on line <b>11</b><br />
#nav-main ul li#space a { background: transparent url("images/") no-repeat left center; height: px; }
#nav-main ul li#space a:hover, #nav-main ul li#space-selected { background: transparent url("images/") no-repeat left center; height: px; }

<br />
<b>Warning</b>:  getimagesize(): Read error! in <b>/web/sites/user/3/61/46035/public/www/menu.css.php</b> on line <b>11</b><br />
#nav-main ul li#space a { background: transparent url("images/") no-repeat left center; height: px; }
#nav-main ul li#space a:hover, #nav-main ul li#space-selected { background: transparent url("images/") no-repeat left center; height: px; }