body{
 background-color:#FFFFFF;
 color:#666666;
 font:10px/16px Arial, Helvetica, sans-serif;
}

#principal_intro{
 background-color:#FFFFFF;
 color:#666666;
 width: 2400px; 
 height: 600px; 
 position: absolute; 
 left: 50%; 
 top: 50%; 
 margin-top: -300px; 
 margin-left: -1200px;
 z-index:1; 
}

#flash{  
 width:2400px;
 position:absolute;
 left:0px;
 top:0px;
 margin:0; 
 padding:0; 
}