<script type="text/javascript">
2
3 function add(num1,num2)
4 { return num1+num2+200;}
5 var sum=add(122,10000);
6 window.document.write(sum);
7
8 </script>
9 <script type="text/javascript">
10 var add=new Function("num"," return num+200"); //此时Function 这种方法用的比较少
11 var sum=add(122);
12 window.document.write(sum);
13
14 </script>
15
16
17 <script type="text/javascript">
18
19 var add=function(num1,num2){ return num1+num2+200;}
20 var sum=add(122,300);
21 window.document.write(sum);
22 </script>
