.header_nav {
    position:absolute;
    width: 63px; height: 21px;
    left: -44px; top: 72px;
}

.header_nav a .mail {
    float: left;
    background: url(../images/mail.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a:hover .mail {
    float: left;
    background: url(../images/mail_on.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a .en {
    float: left;
    margin-left: 12px;
    background: url(../images/en.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a:hover .en {
    float: left;
    margin-left: 12px;
    background: url(../images/en_on.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a .bg {
    float: left;
    margin-left: 12px;
    background: url(../images/bg.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a:hover .bg {
    float: left;
    margin-left: 12px;
    background: url(../images/bg_on.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a .light {
    float: left;
    margin-left: 12px;
    background: url(../images/light.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a:hover .light {
    float: left;
    margin-left: 12px;
    background: url(../images/light_on.png) no-repeat;
    width: 13px; height:11px;
}

.header_nav a .dark {
    float: left;
    margin-left: 12px;
    background: url(../images/dark.png) no-repeat;
    width: 13px; height:11px;
}
.header_nav a:hover .dark {
    float: left;
    margin-left: 12px;
    background: url(../images/dark_on.png) no-repeat;
    width: 13px; height:11px;
}