medidas = new Object();
function centracapa(a) {
	if (!a)
		window.scrollTo(0,0);
		medidas.ancho=document.body.offsetWidth-20;
		medidas.alto=document.body.offsetHeight;
		alturamenu = document.all.banner.scrollHeight;
		capleft = parseInt(((medidas.ancho-770)/2));
		document.all.banner.style.left = capleft;
		document.all.banner.style.visibility= 'visible';
}
function col0 (){
  document.all.banner.style.left = "-50";
  document.all.imgsup.style.width=640;
  document.all.superior.style.left="50";
  window.print();
  centracapa('banner');
  document.all.imgsup.style.width=730;
  document.all.superior.style.left="0";
}