.slider_wrap {
    margin:0 auto;
    width:593px;
    height:241px;
    position:relative;
    overflow:hidden;
}
.slider_wrap img {
    /*width:640px;*/
    height:auto;
    display:none;
    position:absolute;
    top:0;
    left:0px;
}
.slider_wrap img:first-child {
    display:block;
}
.slider_wrap span {
    margin-top:-13px;
    width:15px;
    height:26px;
    display:block;
    position:absolute;
    top:50%;
    cursor:pointer;
    background:url(../images/slider2_arrow.png) no-repeat;
}
.slider_wrap span.next {
    right:0;
    background-position:-15px 0;
}
.slider_wrap span.next:hover {
    background-position:-15px -26px;
}
.slider_wrap span.prev {
    left:0;
    background-position: 0 0;
}
.slider_wrap span.prev:hover {
    background-position: 0 -26px;
}