// funcion para abrir popups
function popup(ruta,target,w,h,scrolls){	
	var ancho = w;
	var alto = h;
	var top = (screen.height/2) - (alto/2);
	var left = (screen.width/2) - (ancho/2);
	
	if(w!=""){
		window.open(ruta,target,"width=" + w + ",height=" + h + ",left=" + left + ",top=" + top + ",scrollbars=" + scrolls);
	}
	else{
		window.open(ruta,target)
	}
}