function initialize() {
	if (document.all) setInterval("stacit_ie()",10);
	else if (document.layers) setInterval("stacit_ns()",10);
	else if (document.getElementById) setInterval("stacit_ns6()",10);
}

function stacit_ie() {
	background.style.left = document.body.scrollLeft;
	background.style.top = document.body.scrollTop;
	capa1.style.left = document.body.scrollLeft;
	capa1.style.top = document.body.scrollTop;
	//alert("1");
}

function stacit_ns() {
	document.background.left = pageXOffset;
	document.background.top = pageYOffset;
	document.capa1.left = pageXOffset;
	document.capa1.top = pageYOffset;
}

function stacit_ns6() {
	document.getElementById("background").style.left = pageXOffset+"px";
	document.getElementById("background").style.top = pageYOffset+"px";
	document.getElementById("capa1").style.left = pageXOffset+"px";
	document.getElementById("capa1").style.top = pageYOffset+"px";
	//alert("holaaaaa");

}

window.onload=initialize;