title: How to change the visibility of a <div> tag using javascript in the same page?
body: <p>I'm working on a simple javascript code. </p>
  
  <p><em><strong>Based on the condition I should change the visibility of the  tag from hidden to visible.</em></strong> </p>
  
  <p>I should use javascript alone. No jQuery or AJAX. Any idea or suggestion please.</p>