title: Changing content on the same html file/page
body: <p>I am not sure how to explain my question, so I could not find anything by searching,but i will do my best to explain it.</p>
  
  <p>I'm just starting to learn html/css and i am working on my first project, and i am curious how do I change content by clicking on navigation bar on the same html page.</p>
  
  <p>here are my image examples:</p>
  
  <p><img src="https://i.stack.imgur.com/OlvKm.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/C2bws.jpg" alt="enter image description here"></p>