#wrapper {
width: 100%;
text-align: center;
margin-top: 10px;
}
#container {
width: 750px;
margin-left:auto;
margin-right:auto;
} 
#header {
width: 100%;
background-color:#FFFFFF;
height: 150px;
margin-bottom: 10px;
}
#content {
width: 100%;
background-color:#FFFFFF;
height: 400px;
}