body {
	background-color: #FFFFFF;
	margin-left: 0px;
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
}

#div_flash_centrado {
	position: absolute;
	width: 900px;
	height: 550px;
	left: 50%;
    top: 50%;
    margin-left: -450px;
    margin-top: -300px;
}