body {
	background: #999;
}
#page {
	width: 960px;
	position: relative;
}
#page:after {
	content: "現在CSS判別1024寬,使用960頁面寬度的CSS顯示佈局[本DEMO由打發時間製作]";
}
#sidebar_l {
	width: 200px;
	float: left;
	height: 300px;
	padding: 10px;
	margin-top: 5px;
	
}
#content {
	float: left;
	padding: 10px;
	height: 300px;
	width: 423px;
	margin: 5px;
}
#sidebar_r {
	padding: 10px;
	float: right;
	width: 200px;
	margin-top: 5px;
	height: 300px;
}