body 
	{
		background-image: url(imagenes/fondo.gif);
		background-repeat: repeat;
		
	}
#contenedor 
	{
	width: 775px;
	height: 756px;
	position:absolute;
	margin-left:-388px;
	left:50%;
	background-color:#FFFFFF;
	border: 1px solid #CCCCCC;		
	}