<!DOCTYPE HTML> <title>Testcase to exercise nsSpanningCellSorter</title> <style type="text/css"> table, td { border-spacing: 0; padding: 0; margin: 0; border: none; empty-cells: show; } td { height: 20px; } </style> <table style="width: 600px"> <tr> <td style="background-color: yellow" colspan="100"></td> <td style="background-color: aqua" colspan="300"><div style="width: 300px"></div></td> </tr> <tr> <td style="background-color: blue" colspan="200"><div style="width: 200px"></div></td> <td style="background-color: fuchsia" colspan="100"></td> <td style="background-color: maroon" colspan="100"></td> </tr> </table>