title: How to highlight cells in an HTML table
body: <p>How do you highlight cells in an HTML table by letting the user select them -- just like you would do in Excel?</p>
  
  <p>Here are 3 samples that show what I mean: <a href="https://i.stack.imgur.com/yXtCK.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yXtCK.jpg" alt="enter image description here"></a></p>