html {
   height: 100%;
   overflow: hidden;}
   
body{
   height: 100%;
   margin:0px;
   padding:0px;
   background: url(img/back-index.jpg) repeat-x #203657;
}
#contenedor {
   position: absolute; 
   top: 50%; 
   left: 50%; 
   margin-left: -175px;
   margin-top: -175px;
   
   width:350px;
   height:350px;}
object {outline:none}