title: variable not incrementing
body: <pre><code>var ro = 0;
  
  function updatePR(sel){
      if(sel.value==1){
          $(".holder").append("&lt;div id='simulador-"+ro+"'&gt;&lt;/div&gt;");
          $("#simulador-"+ro).load("inv-imo.php .IM");
          ro=ro++;
      }else if(sel.value==2){
          $(".holder").append("&lt;div id='simulador-"+ro+"'&gt;&lt;/div&gt;");
          $("#simulador-"+ro).load("poupanca.php .SP");
          ro=ro++;
      }else if(sel.value==3){
          $(".holder").append();
      }
  }
  </code></pre>
  
  <p>I have this code and I'm having trouble with the variable <code>ro</code>, which doesn't increment. </p>
  
  <p>Everytime that I run the function, <code>ro</code> is always 0. </p>
  
  <p>Anyone knows why?</p>