#demo1{ 
    position: relative;    
    margin: 0px auto;
    width: 260px;     
    border:0px solid #ccc;
}
#demo1 .img_list{overflow: hidden; position: relative; height: 90px;}
/* 根据图片的张数来设定ul的宽度 */
.img_list ul{ width: 2600px; position: absolute; height: 90px; left: 0px;margin:0px;padding:0px;}
.img_list li{ float: left; width: 260px;height:90px;}
.img_list img{ margin: 0px; width: 260px; height: 90px;}

#demo1 .toLeft,#demo1 .toRight{
    display: none;
    position: absolute;
    width: 20px;
    height: 30px;    
    top: 110px;    
/*     background: url(../zm/upload/zbbg_24.png) no-repeat 0 -150px; */
}

/* 图片对应的说明*/
.img_intro{
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 25px;
}
.img_intro .img_intro_bg,.img_intro .text{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}
.img_intro .img_intro_bg{
    background: #000;    
    opacity: .3;
    z-index: 999;
}
.img_intro .text{
    padding: 5px 10px;
    z-index: 1000;
    color: #999;
}
#demo1 .toLeft{
    left: -40px;
}
#demo1 .toRight{
    right: -40px;
    background-position: -50px -150px;
}