Align the cell content in a single cell
<html> <head> <script type="text/javascript"> function alignCell(){ var x=document.getElementById('myTable').rows[0].cells x[0].align="center" } </script> </head> <body> <table id="myTable" border="1" width="100%"> <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="alignCell()" value="Align cell content"> </form> </body> </html>