#selector {
    bottom: 0; /* Put at the bottom of the page */
    left: 50%; /* Center its left side */
    transform: translate(-50%, 0); /* Center its center (duh) */

    position: fixed; /* Allow SWF embed to cover it */
    z-index: 1; /* Put in front of SWF embed */
    display: flex;
}

html {
    height: 100%; /* Required for SWF embed */
    overflow: hidden; /* Make sure that there will be no scroll bar */
}

body {
    height: 100%; /* Required for SWF embed */

    /* Remove border */
    margin: 0;
    padding: 0;
}