#div_banner {
	position: relative;
	width: 1200px;
	height: 500px;
	z-index: 1;
}
#div_descargas {
	position: relative;
	width: 1200px;
	height: 300px;
	z-index: 1;
}
#div_bt1 {
	position: absolute;
	width: 328px;
	height: 190px;
	z-index: 2;
	left: 44px;
	top: 93px;
}
#div_bt2 {
	position: absolute;
	width: 328px;
	height: 190px;
	z-index: 2;
	left: 437px;
	top: 93px;
}