How to assign value to a variable based on IF sentences and the Alert? JS

How to assign value to a variable based on IF sentences and the Alert? in JavaScript

Hi, I have this Code that works when I shows the results using Alerts on both cases, basically I evaluate the Visible Status of two controls using Jquery.

If pnlResultados is visible, shows: No Results or No hay Resultados If PnlNoResultados is visible, shows: Results Available or Si Hay Resultados.

So this is my code:

Dim Banner As String = "setDDLday();
var HayDescargaSiONo = 's';
function setDDLday() {
  setTimeout(VerificaResultados,100);
  function VerificaResultados() {
    if ($('#ctl00_MainContent_PnlNoResultados').css('display') != 'none') {
      HayDescargaSiONo ='No Hay Resultados';
    } else if ($('#ctl00_MainContent_PnlResultados').is(':visible')) {
      HayDescargaSiONo ='Si Hay Resultados';
    } else {
      setTimeout(VerificaResultados,100);
    };
  };
  alert (HayDescargaSiONo);
}"

When I put Alert in the next line after I assign a value It shows the result: Ex. "No Hay Resultados". But If I want to get the alert the value of HayDescargaSiONo Variable it said me: "Undefined" and also Is fired faster than the normal, so I can get a value.

What Am I doing wrong?

I want to assign a Value to the HayDescargaSiONo Variable.

If meets the first Condition, then Equals "No" Else If meets the Second Condition, then Equals "Yes".