Får en fejl ved valedring af CSS

Jeg får følgende fejl når jeg validere nedestående kode(valideret: http://jigsaw.w3.org/css-validator/validator-text.html)

Fejl:
Errors
URI : file://localhost/TextArea
Line: 0
Unknown pseudo-element or pseudo-class nodec

Warnings
URI : file://localhost/TextArea
Line : 0 font-family: You are encouraged to offer a generic family as a last alternative


Kode: ¨
frameset {
    border: 0;
}

h1 {
    text-align: center;
}

h2 {
    text-align: center;
    font-family: "Times New Roman", Arial;
}

h3 {
    font-size: 14px;
    font-weight: bold;
    text-align: left;
}

body {
    background-color: #ffffff;
    font-family: Verdana, Arial;
    font-size: 10px;
    margin-left: 10px;
    margin-top: 10px;
    text-align: center;
}

h4 {
    text-align: center;
    font-size: 16px;
    font-family: "Times New Roman", Arial;
}

td {
    font-size: 10px;
}

td.bredde {
    width:200px;
    text-align: center;
}


caption {
    font-size: 14px;
}

img {
    border: 2px;
}

a:nodec {
    text-decoration: none;
}

a:active {
    color: #000000;
}

a {
    color: #5555aa;
}
a img {
    border: none;
}

a:hover {
    color: #ff9400;
}

a:hover img {
    border: 2px solid #ff9400;
}

ul {
    text-align: left;
}