<HEAD> <SCRIPT src=tableDom.js> </SCRIPT> <SCRIPT> function doIt() { var cg = document.getElementsByTagName("COLGROUP")[0]; var col = document.createElement("COL", null); col.width = 200; cg.appendChild(col); } </SCRIPT> </HEAD> <BODY onload="doIt()"> <table bgcolor=orange border> <colgroup> <col> </colgroup> <tr> <td>c11</td><td>c12</td> </tr> </table> </BODY></HTML>