javascriptの中でargmentsの応用

    <script type="text/javascript">

        window.onload=function(){

            function sum(){

                var result=null;

                for(var i=0; i<arguments.length;i++){

                    result+=arguments[i];

                }

                return result;

            }

            alert(sum(1,2));//sum     

            alert(sum(1,2,3,555,888,666,333,555,777)); //sum      

        }

    </script>