SOURCE

<script>  
var i , j;            
    for(i = 1;i <= 9;i ++){                
        document.write("<br>");               // i 为行的乘数，j 为列数  每一行打印完后换行                
        for(j = 1;j <= i;j ++){                    
            sum = i * j;                    
            document.write(i ,"*",j ,"=",sum,"   ");     // 使 "i" 和 "j" 能打印出来                
        }            
    }
</script>