A.bottone{
    DISPLAY: inline;
    text-align:left;
    padding-left:4px;
    width:auto;
    line-height:25px;
    height:25px;
    border-bottom:0px solid #FF0000;
    text-decoration:none;
    background-color:#FFF100; color:#000000;
}

A.bottone:hover {
    TEXT-DECORATION: none;
    background-color:#000000; color:#FFFFFF;
    font-weight:normal;
}