.block.captcha {
    margin-top: 10px;
}
.code_img.captcha-image {
    display: block;
    margin-bottom: 10px;
}
.captcha_update {
    margin-top: 5px;
}

.js_captcha_show + .captcha {
    position: absolute;
    visibility: hidden;
    opacity: 0;
    clip: rect(0,0,0,0);
    filter: alpha(opacity=0);
    z-index: -2;
}
._captcha-show .js_captcha_show + .captcha {
    position: static;
    visibility: visible;
    clip: auto;
    opacity: 1;
    filter: alpha(opacity=100);
    z-index: 2;
}