body{margin: auto; width: 100%; text-align: center;
 font-family: arial, verdana, sans-serif; 
 font-size: 12px;
}

#wrap{width: 600px;text-align: left; }
#header{ margin: auto;
 margin-top: 20px;
 width: 600px;
 text-align: left;
 height: 100px;
}

#content{
 margin: auto;
 width: 600px ;
 text-align: left;
 min-height: 250px;
 padding-bottom: 50px;
}

#footer{
 margin: auto;
 width: 600px;
 text-align: center;
 border-top: solid 1px #D0D0D0;
}