js测试

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Document</title>
 6 </head>
 7 <body>
 8     
 9 </body>
10 <script>
11     /*function outer(){
12         var a = 1;
13         function inner(){
14             a++;
15             alert(a);
16         }
17         return inner();
18     }
19     outer();
20     outer();*/
21 
22     /*var name = 123;
23     var obj = {
24         name:456,
25         getName:function(){
26             return this.name;
27             // return function(){
28             //     return this.name;
29             // }
30         }
31     };
32     alert(obj.getName());*/
33 
34     /*var a = 1;
35     function b(){
36         a = 2;
37         document.write(a);
38         document.write("<br/>");
39         function a(){};
40     }
41     // b();
42     // document.write(a);
43     var bar = b;
44     alert(bar());*/
45     var a = 1;
46 
47     function a(){
48         document.write(a);
49     }
50 
51     document.write(a);
52     document.write("<br/>");
53     a();
54 </script>
55 </html>

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>

</body>
<script>
/*function outer(){
var a = 1;
function inner(){
a++;
alert(a);
}
return inner();
}
outer();
outer();*/

/*var name = 123;
var obj = {
name:456,
getName:function(){
return this.name;
// return function(){
// return this.name;
// }
}
};
alert(obj.getName());*/

/*var a = 1;
function b(){
a = 2;
document.write(a);
document.write("<br/>");
function a(){};
}
// b();
// document.write(a);
var bar = b;
alert(bar());*/
var a = 1;

function a(){
document.write(a);
}

document.write(a);
document.write("<br/>");
a();
</script>
</html>