#main-nav { height: 281px; background-image: url('/images/menu_bg.png'); padding: 16px 0 0 23px; }
#main-nav li a { height: 22px; }

#main-nav li#nav-home a     { background-image: url('/images/homepage/menu_home_off.gif');     height: 20px; }
#main-nav li#nav-about a    { background-image: url('/images/homepage/menu_about_off.gif');    height: 21px; }
#main-nav li#nav-process a  { background-image: url('/images/homepage/menu_process_off.gif');  height: 24px; }
#main-nav li#nav-studies a  { background-image: url('/images/homepage/menu_case_off.gif');     height: 24px; }
#main-nav li#nav-clients a  { background-image: url('/images/homepage/menu_clients_off.gif');  height: 22px; }
#main-nav li#nav-partners a { background-image: url('/images/homepage/menu_partners_off.gif'); height: 23px; }
#main-nav li#nav-faq a      { background-image: url('/images/homepage/menu_faq_off.gif');      height: 24px; }

#main-nav li#nav-home a.on     { background-image: url('/images/homepage/menu_home_on.gif'); }
#main-nav li#nav-about a.on    { background-image: url('/images/homepage/menu_about_on.gif'); }
#main-nav li#nav-process a.on  { background-image: url('/images/homepage/menu_process_on.gif'); }
#main-nav li#nav-studies a.on  { background-image: url('/images/homepage/menu_case_on.gif'); }
#main-nav li#nav-clients a.on  { background-image: url('/images/homepage/menu_clients_on.gif'); }
#main-nav li#nav-partners a.on { background-image: url('/images/homepage/menu_partners_on.gif'); }
#main-nav li#nav-faq a.on      { background-image: url('/images/homepage/menu_faq_on.gif'); }

#main-nav li#nav-home a.here     { background-image: url('/images/homepage/menu_home_on.gif'); }