title: ASPxTextBox ErrorText Not Updated on Lost Focus
body: <p>I got this <code>ASPxTextBox</code>:</p>
  
  <pre><code>&lt;dxe:ASPxTextBox ID="txtFirstName" runat="server"&gt;
      &lt;ClientSideEvents LostFocus="function(s, e) {
          if (s.GetText() == '')
          {
              s.SetIsValid(false);
              s.errorText = 'Please enter First Name.';
          }
      }"&gt;&lt;/ClientSideEvents&gt;
      &lt;ValidationSettings ErrorDisplayMode="ImageWithTooltip"&gt;
      &lt;/ValidationSettings&gt;
  &lt;/dxe:ASPxTextBox&gt;
  </code></pre>
  
  <p>But the <code>errorText</code> displayed isn't what I have set inside the <code>LostFocus</code> event. Instead, the default <code>errorText</code> which is "<em>Invalid value</em>" is displayed in the tool tip.</p>
  
  <p>Any ideas? Thanks</p>