body { 
	font-family:Verdana; 
	font-size:14px; 
	margin:0;
}

#container {
	margin:0 auto; 
	width:960px;
}
#sidebar { 
	float:left; 
	width:220px; 
	height:1000px; 
	background:#F2F6FB;
}
#content { 
	float:right; 
	width:720px; 
	height:2140px;    //here
	background:#F2F6FB;
}/*因为是固定宽度，采用左右浮动方法可有效避免ie 3像素bug*/

#footer { 
	height:10px; 
	background:#F2F6FB;
}

#mainContent { 
	height:1900px; 
	margin-top:15px;
	margin-bottom:15px;
}