#main{
	position: relative;
	width: 780px;
	margin-left: auto;
	margin-right: auto;
	text-align: left;
}

.header{
	width: 780px;
}

.footer{
	clear:both;
}

.menu{
	float: left;
	margin-top:10px;
}

.content{
float:left;
text-align: left;
margin-left: 10px;
margin-right: 10px;
width: 780px;
min-height:330px;
}

.content_bo{
float:left;
text-align: left;
margin-left: 10px;
margin-right: 10px;
width: 600px;
min-height:350px;
}