.icheckbox_square,
.iradio_square {
    display: inline-block;
    *display: inline;
    vertical-align: middle;
    margin: -2px 5px 0px 0px;
    padding: 0;
    width: 16px;
    height: 16px;
    background: url(sp.png) no-repeat;
    border: none;
    cursor: pointer;
}

.icheckbox_square {
    background-position: 0 0;
}
.icheckbox_square.checked {
    background-position: -18px 0;
}
.icheckbox_square.disabled {
    background-position: 0px 0;
    cursor: default;
}
.icheckbox_square.checked.disabled {
    background-position: -36px 0;
}

.iradio_square {
    background-position: -54px 0;
}
.iradio_square.checked {
    background-position: -72px 0;
}
.iradio_square.disabled {
    background-position: -54px 0;
    cursor: default;
}
.iradio_square.checked.disabled {
    background-position: -90px 0;
}