#Div4 {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, .6);
    z-index: 100001;
    overflow: scroll;    
}
#popup1 {
    float: none;
    position: relative;
    width: 374px;
    height: 388px;
    padding: 15px 29px;

   background-image:url('../images/background/banner.jpg')
}