body{margin:0; padding:0; font-family: Tahoma Sans, sans-serif; font-size:13px;}
ul {margin:0; padding:0;}
li {float:left; list-style:none; margin-right:10px;}

li a {
width:84px;
height:60px;
display:block;
text-align:center;
padding-top:20px;
color:#FFFFFF;
text-decoration:none;
}
li a:hover {
width:84px;
height:60px;
background: url(../imagens/bg_botao1.jpg) no-repeat;
color: #F2F2F2;
font-weight:bolder;
}