.qrcode_wrapper {position: relative}
.qrcode {
    display:none;
    position:absolute;
    bottom:30px;
    left:-30px;
    border:1px solid #333;
    border-radius:4px;
    z-index:99999999;
    box-shadow:0px 0px 8px rgba(0,0,0,0.5);
}