#menu{
	float: left;
	background-color: green;
	color: white;
	width: 200px;
	height: 400px;
}
#tips{
	float: right;
	background-color: green;
	color: white;
	width: 100px;
	height: 400px;
}
#content{
	background-color: orange;
	color: white;
	height: 400px;
	text-align: center;
}