body {
	background-position:center top;
}
#contents	{
	width:940px;
	margin:0 auto;
	}
#main	{
	width: 700px;
	margin-left: 5px;
}
#side	{
	width: 0px;
	position: absolute;
	top:120px;
	left: 5px;
}
#ad_side	{
	width:220px;
	position: absolute;
	top:120px;
	left:715px;
	}