#resImage_1206 {
    display:block;
    overflow:hidden;
    background-image:url('https://www.urbansquare.net/assets/images/c/products-commercial-doors-header-d4344963.jpg');
    background-repeat:no-repeat;
    background-position:center center;
        width:100%;
    background-size: cover;
        height:600px;
}
@media screen and (min-width:800px){
    #resImage_1206 {
        background-image:url('https://www.urbansquare.net/assets/images/8/products-commercial-doors-header-84616685.jpg');
                height:625px;
    }
}
@media screen and (min-width:1200px){
    #resImage_1206 {
        background-image:url('https://www.urbansquare.net/assets/images/8/products-commercial-doors-header-84616685.jpg');
                height:625px;
    }
}
@media screen and (min-width:1400px){
    #resImage_1206 {
        background-image:url('https://www.urbansquare.net/assets/images/1/products-commercial-doors-header-99c69816.jpg');
                height:625px;
    }
}