Browse verify this field blank
<p>Good afternoon, I have a doubt.
I have a div with two input button and a div, to send data via $ ajax More event just prior to sending $ ajax, I have to validate these two field Check that this blank. Most do not know how to do it for him not enable the sending if it receives false answer;</p>

<p>Example of my code,</p>

<pre><code>&lt;div id="fields"&gt;
     &lt;input type="text" name="u" class="input" id="u" size="42" /&gt;
     &lt;input type="text" name="s" class="input" id="s" size="10" /&gt;
&lt;/div&gt;
     &lt;input type="submit" class="bt" value="my user" /&gt;
</code></pre>

<p>jquery of my code,</p>

<pre><code> $("input.bt").click(function() {

      var da = $("#u").val();
      var dc = $("#s").val();

      //check this fields blank.
      //Resport true
      //$ ajax send data below ..

    $.ajax({
    ...POST...   
});
</code></pre>

<p>I would be very grateful for the help. :)</p>
