Colspan = 2

Rowspan = 2

Mergerows

mergecols

<check box>

<input check box>

<input = check box>

<input type = "check box">

<tr> and </tr>

<cr> and </cr>

<th> and </th>

<td> and </td>

<tr> and </tr>

<cr> and </cr>

<th> and </th>

<td> and </td>

<img src = "boat.gif" alt = "big boat"/>

<img src = "boat.gif" alt text = "big boat"/>

<img src = "boat.gif" alternate = "big boat"/>

<img src = "boat.gif" alternate text = "big boat"/>