Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <script> function valignCell() { var x=document.getElementById('myTable').rows[0].cells; x[0].vAlign="bottom"; } </script> </head> <body> <table id="myTable" border="1" height="70%"> <tr> <td>First cell</td> <td>Second cell</td> </tr> <tr> <td>Third cell</td> <td>Fourth cell</td> </tr> </table> <form> <input type="button" onclick="valignCell()" value="Vertical align cell content"> </form> </body> </html>
Result:
W3Schools.com - Try it yourself