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<!DOCTYPE html> <html> <head> <style> table, th, td { border: 1px solid black; } </style> </head> <body> <p>Click the button to change the value of the abbr attribute of th with id "myTh".</p> <table> <tr> <th id="myTh" abbr="Make">Toy manufacturer</th> <th abbr="Model">Vehicle model</th> </tr> <tr> <td>Bruder Toys</td> <td>Cross Country Vehicle</td> </tr> </table> <br> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myTh").abbr = "Company"; document.getElementById("demo").innerHTML = "The value of the abbr attribute was changed from 'Make' to 'Company'."; } </script> </body> </html>