document.write("<table border=\"1\">");
document.write("<caption>保元の乱</caption>");
document.write("<colgroup span=\"5\" align=\"right\">");
document.write("<col>");
document.write("<col style=\"background:#f96;\"><col style=\"background:#ffc;\">");
document.write("<col style=\"background:#9fc;\"><col style=\"background:#69f;\">");
document.write("</colgroup>");
document.write("<tr><th></th><th>天皇家</th><th>藤原氏</th><th>平氏</th><th>源氏</th></tr>");
document.write("<tr><th>天皇方</th><td>後白河</td><td>忠通</td><td>清盛</td><td>義朝</td></tr>");
document.write("<tr><th>上皇方</th><td>崇徳</td><td>頼長</td><td>忠正</td><td>為義</td></tr>");
document.write("</table>");