var floatY = 0;
var lastY=-1000;
var delayspeed = 3;
var cuenta = 0;

function adjust() {

	var capa = getObject('bancapa');
	var ancho = (IE6) ? document.documentElement.scrollWidth : ( (NS6) ? Math.abs(window.innerWidth)-16 : ( (IE) ? document.body.scrollWidth : null ) );
	var altoventana = (IE6) ? document.documentElement.scrollTop - 2 :  ( (NS6) ? window.pageYOffset + 2 : ( (IE) ? document.body.scrollTop - 3 : null ) );
				
	//izqcapa = (ancho -746)/2;
	
	//capa.style.width=ancho+"px";
	
	//capa.style.width="inherit";
	//capa.style.left=izqcapa	;

	var dy=Math.abs(altoventana+floatY-lastY);
	var c=Math.round(dy/10);
	
	if (altoventana+floatY>lastY) {lastY=lastY+delayspeed+c;}
	if (altoventana+floatY<lastY) {lastY=lastY-delayspeed-c;}
	
	if (IE6 || NS6) { capa.style.top = lastY+"px";}
	else if (IE) {capa.style.posTop = lastY;}

	setTimeout('adjust()',50);
}

var altura=(IE6) ? document.documentElement.scrollHeight : ( (NS6) ? Math.abs(window.innerHeight) : 0 );

function define() {
	if (IE && !IE6) {altura=document.body.offsetHeight; }
								
	capa = getObject('bancapa');
	
	layerheight = capa.offsetHeight;

	floatY=altura-layerheight;
}