#big_image .bibka {
    display: block;
    width: 545px;
    height: 440px;
    overflow: hidden;
    padding-right: 15px;
}
#big_image .bibka:not(.megabib){
    display: none;
}

#big_image{
    width: 560px;
    height: 440px;
}

#big_image img {
    height: auto;
    width: 100%;
}