javascript中arguments的应用——不定项传参求和
<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中参数两个 alert(sum(1,2,3,555,888,666,333,555,777)); //sum中参数任意个 } </script>