SOURCE

document.write("<table>");
for(var row = 1; row < 10; row++) {
    document.write("<tr>");
    for(var blank = 9 - row; blank > 0; blank--) {
        document.write("<td></td>");
    }
    for(var column = row; column > 0; column--) {
        document.write("<td class='content'>" + row + "x" + column + "=" + row * column + "</td>");
    }
    document.write("</tr>");
}
document.write("</table>");

table td.content {
    border: 1px solid skyblue;
}