body {
    background-color: #DCDCDC;
    margin: 0;
    text-align: center;
}
div.top {
    background: url("images/bg01.jpg") no-repeat scroll center bottom transparent;
    height: 5%;
    margin: auto;
}
div.main {
    background: url("images/bg02.jpg") no-repeat scroll center top transparent;
    height: 367px;
    margin: auto;
}
div.down {
    background: url("images/bg03.jpg") no-repeat scroll center top transparent;
    height: 179px;
    margin: auto;
}
div#enter {
    height: 30px;
    left: 50%;
    margin-left: -389px;
    position: absolute;
    width: 778px;
}
div#bt01 a {
    background: url("images/bt.jpg") no-repeat scroll left top transparent;
    float: left;
    height: 30px;
    margin-left: 227px;
    width: 88px;
}
div#bt01 a:hover {
    background: url("images/btr.jpg") no-repeat scroll left top transparent;
}
div#bt02 a {
	float: left;
	height: 30px;
	width: 85px;
	background-attachment: scroll;
	background-color: transparent;
	background-image: url(images/bt.jpg);
	background-repeat: no-repeat;
	background-position: center top;
}
div#bt02 a:hover {
    background: url("images/btr.jpg") no-repeat scroll center top transparent;
}
div#bt03 a {
    background: url("images/bt.jpg") no-repeat scroll right top transparent;
    float: left;
    height: 30px;
    width: 88px;
}
div#bt03 a:hover {
    background: url("images/btr.jpg") no-repeat scroll right top transparent;
}