摘要：
<html> <head> </head> <body > <script type="text/javascript"> function sum() { var result = 0; for(var i = 0; i < arguments.length; i++){ result += ar 阅读全文
摘要：
<html> <head> </head> <body > <script type="text/javascript"> function scream(animal) { switch(animal){ case "dog": document.write('wangwang'); return 阅读全文