.containerMain {
    position: relative;
    left:0px;
    top:50px;
}
.containerMAP {
    width:2000px;
    height: 1000px;
    border: 1px solid #cCC;
    position: absolute;
    left:50px;
    top: 0px;
}

.bk_img {
    width: 100%;
    height: 100%;
    border: 2px solid #CCCCCCC;
   
}