css slideshow

*{
    padding: 0px;
    margin: 0px;
}

#container {
    width:900px;
    height: auto;
    margin-left: auto;
    margin-right: auto;
}

#sliderdiv {
    height: 400px;
    width: 100%;
    position:relative;
}


#left {
    height:80px;
    width:80px;
}


#buttons {
    height:100px;
    width:100%;
    position:absolute;
    top:28%;

}


.next {
    float:right;
    line-height:100px;
    }

.previous {
    float:left;
    vertical-align:center;
}


#caption {
    height:100px;
    width:100%;
    background-color:black;
    position:absolute;
    opacity:0.5;
    bottom:0;
    color:white;
}