title: Selenium IDE, check (assert) if a dynamic element contains a specific text
body: <p>In my website, I have a form who add a new 'td' element in a table.
  The content of td elements contains a random identifier</p>
  
  <p>After submit, I have an html structure like that : </p>
  
  <pre><code>&lt;table&gt;
      &lt;tr&gt;
          &lt;td class="a"&gt;edazdad&lt;/td&gt;
          &lt;td class="b"&gt;dscsdcsdc&lt;/td&gt;
          ...
          &lt;td class="n"&gt;rkjrlejf&lt;/td&gt;
      &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>So, I want add an assert test in selenium IDE. I want check if my new element is in my table html element.</p>
  
  <p>I try : </p>
  
  <p>AssertText</p>
  
  <ul>
  <li>//table/tr/td[contains(text(), 'dscsdcsdc')]::text()</li>
  <li>dscsdcsdc</li>
  <li>but I get the "selenium ide" error : "There were no alerts"</li>
  </ul>
  
  <p>or </p>
  
  <p>AssertText</p>
  
  <ul>
  <li>//table/tr/td[contains(text(), 'dscsdcsdc')]/text()</li>
  <li>dscsdcsdc</li>
  <li>I get the same "selenium ide" error : "There were no alerts"</li>
  </ul>
  
  <p>How can I do that ? =)</p>