#resImage_245 {
    display:block;
    overflow:hidden;
    background-image:url('https://www.glendalejoinery.co.uk/assets/images/5/windows-header-e6224c96.jpg');
    background-repeat:no-repeat;
    background-position:center center;
        width:100%;
    background-size: cover;
        height:500px;
}
@media screen and (min-width:700px){
    #resImage_245 {
        background-image:url('https://www.glendalejoinery.co.uk/assets/images/8/windows-header-b1636c16.jpg');
                height:500px;
    }
}
@media screen and (min-width:980px){
    #resImage_245 {
        background-image:url('https://www.glendalejoinery.co.uk/assets/images/7/windows-header-30c3ca91.jpg');
                height:500px;
    }
}
@media screen and (min-width:1400px){
    #resImage_245 {
        background-image:url('https://www.glendalejoinery.co.uk/assets/images/d/windows-header-8d72f2a3.jpg');
                height:500px;
    }
}