Question

I am trying to display this section

<tr>
  <div id="contact" class="uniForm" style="visibility: hidden; display: none;">    
    <fieldset class="blockLabels">
      <legend style="font-size: 10pt;">Contacts</legend>
      <div class="ctrlHolder">
        <%= this.strContactInfo%>
      </div>
    </fieldset>
  </div>
</tr>

only if this condition is met:

if (iStatus == 2)
{
  lblAccessError2.Text = "Failure. ";
  Page.ClientScript.RegisterStartupScript(this.GetType(), "clientscript1", "document.getElementById('contact').style.visibility = 'visible';", true);                 
  ModalPopupExtender1.Show();           
}

Answer 1

You forgot to change the element’s display rule also. You need to set it according to the uniForm class, or by default to block.

document.getElementById('contact').style.display = 'block';

For the record, a working example.