rules 属性可设置或返回表格的内部边线。
tableObject.rules=none|groups|rows|cols|all
下面的例子设置了表格的两种不同的内部边线:
<html> <head> <script type="text/javascript"> function rowRules() {document.getElementById('myTable').rules="rows"
} function colRules() {document.getElementById('myTable').rules="cols"
} </script> </head> <body> <table id="myTable" border="1"> <tr> <td>Row1 cell1</td> <td>Row1 cell2</td> </tr> <tr> <td>Row2 cell1</td> <td>Row2 cell2</td> </tr> <tr> <td>Row3 cell1</td> <td>Row3 cell2</td> </tr> </table> <br /> <input type="button" onclick="rowRules()" value="Show only row borders"> <input type="button" onclick="colRules()" value="Show only col borders"> </body> </html>