body 
{ 
 margin: 0; 
 padding: 0; 
 padding-top: 10px;
 text-align: center; 
} 
#centered
{ 
 width: 800px; /* set to desired width in px or percent */
 text-align: left; /* optionally you could use "justified" */
 border: 0px; /* Changing this value will add lines around the centered area */
 padding: 0;  
 margin: 0 auto; 
}