看下面的代码即可
<script type="text/javascript">
document.write("<table cellspacing='0'>");
for (var i = 1; i < 10; i++) {
document.write("<tr >")
for (var j = 1; j <= i; j++) {
document.write("<td style='border: 1px solid;'>" + j + "*" + i + "=" + i * j + "</td>");
}
document.write("</tr>");
}
document.write("</table>");
</script>