var param ="&usuario="+usuario+"&nivel="+nivel+gano+porc_gano+gasto+porc_gasto+tengo+porc_tengo+debo+porc_debo+plazo_debo;
var s = document.createElement("script");
s.src = direccion_servidor +"setMisDatos?callback=respuestaGuardarMisDatos¶m="+encodeURIComponent(param);
h = document.getElementsByTagName("script");
i got the parentNode.insertBefore code from google (the same they use in google analitycs), but still i get error (specifically when he has to do the parentNode.insertBefore part (earlier it was only appendChild, but used to give me the same kind of error. Are the spaces a problem in this sense? Or there might be a better solution? because if i click the second time it enters the setMisDatos function and then works 100%. This is really driving me crazy, can anybody help me?