#dropinboxv2cover {
    width: 520px; /*change width to desired */
    /* height: 220px;  change height to desired. REMOVE if you wish box to be content's natural height */
    position: absolute; /*Don't change below 4 rules*/
    z-index: 100;
    overflow: hidden;
    visibility: hidden;
}

#dropinboxv2 {
    width: 500px; /*change width to above width-20. */
    /* height: 200px; change height to above height-20. REMOVE if you wish box to be content's natural height*/
    border: 2px solid black; /*Customize box appearance*/
    background-color: #ffffe0; /* lightyellow */
    padding: 8px;
    position: absolute; /*Don't change below 3 rules */
    left: 0;
    top: 0;
}