js 九九乘法表

 1 <script>
 2     var arr = [];
 3     for(var i=1;i<10;i++){
 4         arr[i] = [];
 5         for(var j=1;j<=i;j++){
 6             arr[i][j] = j+"x"+i +"="+j*i;
 7         }
 8     }
 9     for(var i in arr){
10         for(var j in arr[i]){
11             document.write(arr[i][j]);
12             document.write("&nbsp;&nbsp;&nbsp;");
13         }
14         document.write("<br>");
15     }
16 
17 </script>