Return the emptyCells property:
alert(document.getElementById("myTable").style.emptyCells);
<!DOCTYPE html> <html> <head> <style> table, td { border: 1px solid black; border-collapse: separate; } </style>//from w ww.j a va 2 s .co m </head> <body> <table id="myTable" style="empty-cells:hide;"> <caption id="myCaption">Monthly Salary</caption> <tr> <th>Item</th> <th>Savings</th> </tr> <tr> <td>CSS</td> <td>$100</td> </tr> <tr> <td>HTML</td> <td>$50</td> </tr> </table> <br> <button type="button" onclick="myFunction()">Return the emptyCells property</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("demo").innerHTML = document.getElementById("myTable").style.emptyCells; } </script> </body> </html>