var scrollAmount = 100;
var timeOut;

function scrollDown() {
	var myAnim = new YAHOO.util.Scroll(document.getElementById("scroll"), { scroll: { by: [0, scrollAmount] } }, .5, YAHOO.util.Easing.easeOut).animate();
}

function scrollUp() {
	var myAnim = new YAHOO.util.Scroll(document.getElementById("scroll"), { scroll: { by: [0, (-scrollAmount)] } }, .5, YAHOO.util.Easing.easeOut).animate();
}

function scrollSx() {
	var myAnim = new YAHOO.util.Scroll(document.getElementById('madre'), { scroll: { by: [(-scrollAmount), 0] } }, .2);
	myAnim.animate();
	timeOut = setTimeout('scrollSx()', 200);
	
}

function scrollDx() {
	var myAnim = new YAHOO.util.Scroll(document.getElementById('madre'), { scroll: { by: [(scrollAmount), 0] } }, .2);
	myAnim.animate();
	timeOut = setTimeout('scrollDx()', 200);
	
}