cinturon = new Image();
cinturon.src = "../imagenes/cinturon1B.gif";

function cambiagif(img_name,img_src) {
document [img_name].src=img_src;
}

function AbrirVentana(sPagina, nTamX, nTamY)
{
	var nAnchura, nAltura, nTop, nLeft, sPropsVentana;
	nAnchura = screen.availWidth;
	nAltura = screen.availHeight;
	nTop = (nAltura - nTamY - 30) * .5;
	nLeft =  (nAnchura - nTamX - 10) * .5;
	sPropsVentana  = 'width=' + nTamX + ',height=' + nTamY;
	sPropsVentana += ',top=' + nTop + ',left=' + nLeft;
	sPropsVentana += ',scrollbars=no,menubar=no,toolbar=no,directories=no,location=no,status=no';
	return(window.open(sPagina,'',sPropsVentana));
}