.MouseoverNav_back,
.MouseoverNav_next {
    position:absolute;
    top:25%;
    width:25%;
    height:50%;
    background-image:url( "../img/blank.png" );
}

.MouseoverNav_back_mouseover,
.MouseoverNav_next_mouseover {
    cursor:pointer;
    background-repeat:no-repeat;
}

.MouseoverNav_back {
    left:0px;
}

.MouseoverNav_back_mouseover {
    background-image:url( "../img/button-left.png" );
    background-position:10% center;
}

.MouseoverNav_next {
    right:0px;
}

.MouseoverNav_next_mouseover {
    background-image:url( "../img/button-right.png" );
    background-position:90% center;
}