body, html {
	background-color: #3D3535;
	margin: 0px;
	height: 100%;
	background-image: url(bg.gif);
	background-repeat: repeat;
	background-attachment: fixed;
	background-position: center;
}
.ombrasx {
	background-image: url(img/sx.jpg);
	background-repeat: repeat-y;
	background-position: right;
}
.ombradx {

	background-image: url(img/dx.jpg);
	background-repeat: repeat-y;
	background-position: left;
}