body {
    padding: 0;
    margin: 0;
    overflow: hidden;
}

.ifpage {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    top: -45px;
    left: 0px;
    bottom: 0px;
    right: 0px;
    border: none;
    overflow: hidden;
    z-index: 999999;
    position: absolute;
}