function AbrirVentana (Url,target,width,height,status,toolbar,menubar,scrollbars,resizable) {
	var ancho = width;
	var alto = height;
	var adicionales=	',status=' + status +
						',toolbar=' + toolbar +
						',menubar=' + menubar +
						',scrollbars=' + scrollbars +
						',resizable=' + resizable;
	var top = (screen.height-alto)/3;
	var left = (screen.width-ancho)/2;
	nuevaVentana=window.open(Url,target, 'width=' + ancho + ',height=' + alto + ',top=' + top + ',left=' + left + adicionales);
	nuevaVentana.focus();
}