#dou{
    bottom:-124px;
    left:0;
    width:214px;
    height:124px;
    z-index:99999;
    position:fixed;
    background:url("../images/dou.jpg") no-repeat center;
}
#dou .dou-a{
    width:100%;
    height:100%;
    display:block;
}
#dou .dou-x{
    top:0;
    right:0;
    width:29px;
    height:35px;;
    display:block;
    cursor:pointer;
    position:absolute;
    background:url("../images/dou-x.png") no-repeat center 13px;
}