<html xmlns="http://www.w3.org/1999/xhtml"> <head> <script> function boo() { document.getElementById("td46").setAttribute("rowspan", 3); document.getElementById("tbody6").appendChild(document.createTextNode('X')); } window.addEventListener("load", boo, false); </script> </head> <body> <table border="1"> <tbody id="tbody6"> <tr id="tr7"> <td>A</td> <td>B</td> Y </tr> <tr> <td>C</td> <td id="td46">D</td> </tr> </tbody> </table> </body> </html>