JavaScript 动态生成九九乘法表

<script type="text/javascript">
    var sum=0;
    var wite;
    for (var i = 1; i < 10; i++){
      var div=$('<div class="class'+i+'"></div>');
      $("body").append(div);
      for(var j = i; j > 0; j--){
        sum = j * i;
        wite = (j+"X"+i+"="+sum);

        div.prepend($('<span style="padding-right:10px">'+wite+'</span>'));
      }
      
    } 
  </script>