<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>菜鸟教程(runoob.com)</title> </head> <body> <p>计算所有参数之和：</p> <p id="demo"></p> <script> function sumAll() { var i, sum = 0; for(i = 0; i < arguments.length; i++) { sum += arguments[i]; } return sum; } document.getElementById("demo").innerHTML = sumAll(1, 123, 500, 115, 44, 88); </script> </body> </html>