1.<!--   
2.    var Map=function(){   
3.        this.mapArr={};   
4.        this.arrlength=0;   
5.  
6.        //假如有重复key，则不存入   
7.        this.put=function(key,value){   
8.          if(!this.containsKey(key)){   
9.           this.mapArr[key]=value;   
10.           this.arrlength=this.arrlength+1;   
11.          }   
12.        }   
13.        this.get=function(key){   
14.          return this.mapArr[key];   
15.        }   
16.  
17.        //传入的参数必须为Map结构   
18.        this.putAll=function(map){   
19.           if(Map.isMap(map)){   
20.               var innermap=this;   
21.               map.each(function(key,value){   
22.                  innermap.put(key,value);   
23.               })   
24.           }else{   
25.             alert("传入的非Map结构");   
26.           }   
27.        }   
28.        this.remove=function(key){   
29.              delete this.mapArr[key];   
30.              this.arrlength=this.arrlength-1;   
31.        }   
32.        this.size=function(){   
33.             return this.arrlength;   
34.        }   
35.  
36.        //判断是否包含key   
37.        this.containsKey=function(key){   
38.              return (key in this.mapArr);   
39.        }   
40.        //判断是否包含value   
41.        this.containsValue=function(value){   
42.              for(var p in this.mapArr){   
43.                 if(this.mapArr[p]==value){   
44.                    return true;   
45.                 }   
46.              }   
47.              return false;   
48.        }   
49.        //得到所有key 返回数组   
50.        this.keys=function(){   
51.           var keysArr=[];   
52.           for(var p in this.mapArr){   
53.             keysArr[keysArr.length]=p;   
54.           }   
55.           return keysArr;   
56.        }   
57.        //得到所有value 返回数组   
58.        this.values=function(){   
59.          var valuesArr=[];   
60.           for(var p in this.mapArr){   
61.             valuesArr[valuesArr.length]=this.mapArr[p];   
62.           }   
63.           return valuesArr;   
64.        }   
65.           
66.        this.isEmpty=function(){   
67.           if(this.size()==0){   
68.             return false;   
69.           }   
70.           return true;   
71.        }   
72.        this.clear=function(){   
73.             this.mapArr={};   
74.             this.arrlength=0;   
75.        }   
76.        //循环   
77.        this.each=function(callback){   
78.            for(var p in this.mapArr){   
79.             callback(p,this.mapArr[p]);   
80.           }   
81.  
82.        }   
83.           
84.  
85.    }   
86.    //判断是否是map对象   
87.    Map.isMap=function(map){   
88.      return  (map instanceof Map);   
89.    }   
90.  
91.  
92.    var map=new Map();   
93.    map.put("afei",25);   
94.    map.put("yaoming",31);   
95.    map.put("pp",2);   
96.    map.put("bill","55");   
97.    map.remove("afei");   
98.  
99.    var map2=new Map();   
100.    map2.put("003",333);   
101.    map2.put("004",444);   
102.    map.putAll(map2);   
103.  
104.  
105.    map.each(function(key,value){   
106.        alert(key+" : "+value);   
107.    })   
108.  
109.  
110.       
111. //-->   
112.