#resImage_257 {
    display:block;
    overflow:hidden;
    background-image:url('https://www.glendalejoinery.co.uk/assets/images/5/doors-header-609e6dc2.jpg');
    background-repeat:no-repeat;
    background-position:center center;
        width:100%;
    background-size: cover;
        height:500px;
}
@media screen and (min-width:700px){
    #resImage_257 {
        background-image:url('https://www.glendalejoinery.co.uk/assets/images/4/doors-header-d5bc95a5.jpg');
                height:500px;
    }
}
@media screen and (min-width:980px){
    #resImage_257 {
        background-image:url('https://www.glendalejoinery.co.uk/assets/images/1/doors-header-4f62da80.jpg');
                height:500px;
    }
}
@media screen and (min-width:1400px){
    #resImage_257 {
        background-image:url('https://www.glendalejoinery.co.uk/assets/images/d/doors-header-bddd73fc.jpg');
                height:500px;
    }
}