CSS超连接接触时突变

a:link         {...}{
    color: #000000;
    text-decoration: none;
    font-family: "Arial", "Helvetica", "sans-serif";
}
a:visited    {...}{
    color: #000000;
    text-decoration: none;
    font-family: "Arial", "Helvetica", "sans-serif";
}
a:active     {...}{
    color: #000000;
    text-decoration: underline;
    font-family: "Arial", "Helvetica", "sans-serif";
}
a:hover      {...}{
    color: #FF6600;
    text-decoration: underline;
    left: 1px;
    position: relative;
    top: 1px;
    font-family: "Arial", "Helvetica", "sans-serif";
}