#home_01:hover {
	background-image:url(images/home_01_on.png);
}
#home_02:hover {
	background-image:url(images/home_02_on.png);
}
#home_03:hover {
	background-image:url(images/home_03_on.png);
}

* {
    margin: 0;
    padding: 0;
}

html, body, #bg, #bg table, #bg td {
    height:100%;
    width:100%;
    overflow:hidden;
}

#bg {
    position: fixed;
}

#bg div {
    height:200%;
    left:-50%;
    position:absolute;
    top:-50%;
    width:200%;
}

#bg td {
    text-align:center;
    vertical-align:middle;
}

#bg img {
    margin:0 auto;
    min-height:50%;
    min-width:50%;
}