.alt1 {
    margin: 0;
    padding: 0;
    list-style-type: none;
}

.alt1 a {
    display: block;
    width: 140px;
    height: 40px;
    margin: 0;
    padding: 0;
    text-indent: -9999px;
    background-repeat: no-repeat;
    background-position: top center;
    text-decoration: none;
    overflow: hidden;
}

.alt1 a:link {
    color: blue;
    background-image: url(http://img.47news.jp/images/coram.png);
}

.alt1 a:visited {
    color : purple;
    background-image: url(http://img.47news.jp/images/coram.png);
}

.alt1 a:hover {
    color: red;
    background-image: url(http://img.47news.jp/images/coram_over.png);
    background-color: transparent;
}

.alt1 a:active {
    color: green;
    background-image: url(http://img.47news.jp/images/coram.png);
}

.alt2 {
    margin: 0;
    padding: 0;
    list-style-type: none;
}

.alt2 a {
    display: block;
    width: 140px;
    height: 40px;
    margin: 0;
    padding: 0;
    text-indent: -9999px;
    background-repeat: no-repeat;
    background-position: top center;
    text-decoration: none;
    overflow: hidden;
}

.alt2 a:link {
    color: blue;
    background-image: url(http://img.47news.jp/images/back.png);
}

.alt2 a:visited {
    color: purple;
    background-image: url(http://img.47news.jp/images/back.png);
}

.alt2 a:hover {
    color: red;
    background-image: url(http://img.47news.jp/images/back_over.png);
    background-color: transparent;
}

.alt2 a:active {
    color: green;
    background-image: url(http://img.47news.jp/images/back.png);
}