title: Enable and disabled Select in html form under condition
body: <p>In my html form I have these <em>Select</em>:</p>
  
  <pre><code>&lt;select size="1" name="First_Answer"&gt;                  
                    &lt;option value=""&gt;Select&lt;/option&gt;
                    &lt;option value=""&gt;----&lt;/option&gt;
                    &lt;option value="Y"&gt;Yes&lt;/option&gt;
                    &lt;option value="N"&gt;No&lt;/option&gt;
  &lt;/select&gt;
  
  &lt;select size="1" name="Second_Answer"&gt;                  
                    &lt;option value=""&gt;Select&lt;/option&gt;
                    &lt;option value=""&gt;----&lt;/option&gt;
                    &lt;option value="Y"&gt;Yes&lt;/option&gt;
                    &lt;option value="N"&gt;No&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>In start page I need disabled the <strong>select</strong> Second_Answer.</p>
  
  <p>I need enabled the <strong>select</strong> <em>Second_Answer</em> only when in the <strong>select</strong> <em>First_Answer</em> I have selected <strong>No</strong> value.</p>
  
  <p>Can you help me?</p>
  
  <p>Thank you in advance.</p>
  
  <p><strong>EDIT 01</strong></p>
  
  <pre><code>&lt;script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"&gt;&lt;/script&gt;
  
  &lt;script&gt;
  $("select[name=First_Answer]").change(function(){
      var first_answer = $(this).val();
  
      if(first_answer == 'N')
      {
          $("select[name=Second_Answer]").removeAttr("disabled");
      }
      else
      {
          $("select[name=Second_Answer]").attr("disabled", true);
      }
  });
  &lt;/script&gt;
  
  &lt;select size="1" name="First_Answer"&gt;                  
      &lt;option value=""&gt;Select&lt;/option&gt;
      &lt;option value=""&gt;----&lt;/option&gt;
      &lt;option value="Y"&gt;Yes&lt;/option&gt;
      &lt;option value="N"&gt;No&lt;/option&gt;
  &lt;/select&gt;
  
  &lt;select size="1" name="Second_Answer" disabled="disabled"&gt;                  
      &lt;option value=""&gt;Select&lt;/option&gt;
      &lt;option value=""&gt;----&lt;/option&gt;
      &lt;option value="Y"&gt;Yes&lt;/option&gt;
      &lt;option value="N"&gt;No&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>