5、JS中输出九九乘法表


<script>

var str = "<table width='600' border='1' align='center' rules='all'>";

//变量初始化，用变量i代替行<tr></tr>

var i = 1;

while(i<=9){

str += "<tr>";  

//循环九列，用变量j来代表列

var j = 1;

while(j<=i){

   str += "<td>" + j + "×" + i + "=" + j*i + "</td>";

//变量更新

   j++;

}

   str += "</tr>";

//变量更新

   i++;

}

   str += "</table>";

//输出结果

document.write(str);

</script>