title: How to get a cells value in html table with JQuery
body: <p>I seen a lot of post talk about my problem but any of one work for me.</p>
  
  <p>I've this html table, I would to get the values under the cell (th) "Index".
  How can I use jQuery for making this:</p>
  
  <pre><code>&lt;table id="htmlTable"&gt;
      &lt;caption&gt;Informations des hotspots&lt;/caption&gt;
      &lt;thead&gt;
          &lt;tr&gt;
              &lt;th&gt;Index&lt;/th&gt;
              &lt;th&gt;Nom du hotspot&lt;/th&gt;
              &lt;th&gt;Image du hotspot&lt;/th&gt;
          &lt;/tr&gt;
      &lt;/thead&gt;
      &lt;tbody&gt;
          &lt;tr id="0"&gt;
              &lt;td&gt;0&lt;/td&gt;
              &lt;td&gt;Hotspot Fribourg Centre&lt;/td&gt;
              &lt;td&gt;../images/logos_hotspot/logo_wifi_centre.png&lt;/td&gt;
              &lt;td&gt;
                  &lt;input type="button" value="supprimer" /&gt;
              &lt;/td&gt;
          &lt;/tr&gt;
          &lt;tr id="1"&gt;
              &lt;td&gt;1&lt;/td&gt;
              &lt;td&gt;Hotspot Avry Centre&lt;/td&gt;
              &lt;td&gt;../images/logos_hotspot/logo_wifi_avry.png&lt;/td&gt;
              &lt;td&gt;
                  &lt;input type="button" value="supprimer" /&gt;
              &lt;/td&gt;
          &lt;/tr&gt;
      &lt;/tbody&gt;
  &lt;/table&gt;
  </code></pre>