1 <script type="text/javascript">
2 var num=prompt("请输入一个数值")
3
4 for (var i = 1; i <= num; i++) {
5 for (var j = 1; j<=i; j++) {
6 document.write(i+"x"+j+"="+i*j+" ");
7 }document.write("<br>");
8 }
9 </script>
原文：https://www.cnblogs.com/wszzj/p/12240342.html