#buttons {margin:auto;width:380px;height:28px;padding-left:30px;}
#buttons li {display:inline;padding:0;margin:0 24px 0 0;float:left;}
#buttons a {display:block;text-decoration: none;}
#buttons a:hover {background-position:0 -28px;border-bottom:2px solid #fff;}

a.butt1 {width:79px;height:28px;background: url("images/mnu_01_it.gif") 0 0 no-repeat;}
a.butt2 {width:65px;height:28px;background: url("images/mnu_02_it.gif") 0 0 no-repeat;}
a.butt3 {width:38px;height:28px;background: url("images/mnu_03_it.gif") 0 0 no-repeat;}
a.butt4 {width:26px;height:28px;background: url("images/mnu_04_it.gif") 0 0 no-repeat;}
a.butt5 {width:51px;height:28px;background: url("images/mnu_05_it.gif") 0 0 no-repeat;}
a.butt6 {width:66px;height:28px;background: url("images/mnu_06_it.gif") 0 0 no-repeat;}