'frame' determines how to display a table's border frame
<HTML> <BODY> <table id="myTable" border="3" frame=""> <thead> <tr> <td>Header</td> <td>Header</td> <td>Header</td> <td>Header</td> <td>Header</td> <td>Header</td> </tr> </thead> <tr> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> </tr> <tr> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> </tr> <tr> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> </tr> <tr> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> <td>Cell</td> </tr> <tfoot> <tr> <td>Footer</td> <td>Footer</td> <td>Footer</td> <td>Footer</td> <td>Footer</td> <td>Footer</td> </tr> </tfoot> </table> <br> <button onclick="myTable.frame='void'">VOID</button> <button onclick="myTable.frame='above'">ABOVE</button> <button onclick="myTable.frame='below'">BELOW</button> <button onclick="myTable.frame='border'">BORDER</button> <button onclick="myTable.frame='hsides'">HSIDES</button> <button onclick="myTable.frame='lhs'">LHS</button> <button onclick="myTable.frame='rhs'">RHS</button> <button onclick="myTable.frame='vsides'">VSIDES</button> <button onclick="myTable.frame='box'">BOX</button> </BODY> </HTML>