<script>
var str = "<table width='600' border='1' align='center' rules='all'>";
//變數初始化，用變數i代替行<tr></tr>
var i = 1;
while(i<=9){
str += "<tr>";  
//迴圈九列，用變數j來代表列
var j = 1;
while(j<=i){
   str += "<td>" + j + "×" + i + "=" + j*i + "</td>";
//變數更新
   j++;
}
   str += "</tr>";
//變數更新
   i++;
}
   str += "</table>";
//輸出結果
document.write(str);
</script>