#centering { 
position:absolute;
width: 1000px ; 
margin-left: auto ; 
margin-right: auto ;
top: 50%;
margin-top: -312px;
 text-align: center; 
min-width: 1000px; 
 
}

#div-1 {
 position:relative;

}
#div-1a {
 position:absolute;
 top:36px;
 left:257px;
 width:320px;
}