#hideAll {
    position: fixed;
    left: 0px;
    right: 0px;
    top: 0px;
    bottom: 0px;
    background-color: white;
    z-index: 99;
    /* higher than anything else in the document*/
}

#hideAll div {
    position: relative;
    height: 100%;
}

#hideAll div p {
    width: 100%;
    text-align: center;
    position: absolute;
    top: 50%;
    -moz-transform: translate(0, -50%);
    -ms-transform: translate(0, -50%);
    -o-transform: translate(0, -50%);
    -webkit-transform: translate(0, -50%);
    transform: translate(0, -50%);
}