#main_container {
	background-color: #FFFFFF;
	height: 550px;
	width: 800px;
	margin-right: auto;
	margin-left: auto;
	position: relative;
}
#header {
	background-color: #66FFFF;
	height: 50px;
	width: 100%;
	position: relative;
}
#header_left {
	background-color: #FFFFFF;
	height: 50px;
	width: 300px;
	float: left;
}
#header_right {
	background-color: #FFFFFF;
	height: 50px;
	width: 500px;
	position: relative;
	float: left;
}
#container {
	background-color: #FFFFFF;
	position: relative;
	height: 500px;
	width: 800px;
}