mis.comm.js.Map = function() {    this.elements = new Array();     //获取MAP元素个数    this.size = function() {        return this.elements.length;    }     //推断MAP是否为空    this.isEmpty = function() {        return (this.elements.length < 1);    }     //删除MAP全部元素    this.clear = function() {        this.elements = new Array();    }     //向MAP中添加元素（key, value)    this.put = function(_key, _value) {        this.elements.push( {            key : _key,            value : _value        });    }     //删除指定KEY的元素，成功返回True，失败返回False    this.remove = function(_key) {        var bln = false;        try {            for (i = 0; i < this.elements.length; i++) {                if (this.elements[i].key == _key) {                    this.elements.splice(i, 1);                    return true;                }            }        } catch (e) {            bln = false;        }        return bln;    }     //获取指定KEY的元素值VALUE，失败返回NULL    this.get = function(_key) {        try {            for (i = 0; i < this.elements.length; i++) {                if (this.elements[i].key == _key) {                    return this.elements[i].value;                }            }        } catch (e) {            return null;        }    }     //获取指定索引的元素（使用element.key，element.value获取KEY和VALUE），失败返回NULL    this.element = function(_index) {        if (_index < 0 || _index >= this.elements.length) {            return null;        }        return this.elements[_index];    }     //推断MAP中是否含有指定KEY的元素    this.containsKey = function(_key) {        var bln = false;        try {            for (i = 0; i < this.elements.length; i++) {                if (this.elements[i].key == _key) {                    bln = true;                }            }        } catch (e) {            bln = false;        }        return bln;    }     //推断MAP中是否含有指定VALUE的元素    this.containsValue = function(_value) {        var bln = false;        try {            for (i = 0; i < this.elements.length; i++) {                if (this.elements[i].value == _value) {                    bln = true;                }            }        } catch (e) {            bln = false;        }        return bln;    }     //获取MAP中全部VALUE的数组（ARRAY）    this.values = function() {        var arr = new Array();        for (i = 0; i < this.elements.length; i++) {            arr.push(this.elements[i].value);        }        return arr;    }     //获取MAP中全部KEY的数组（ARRAY）    this.keys = function() {        var arr = new Array();        for (i = 0; i < this.elements.length; i++) {            arr.push(this.elements[i].key);        }        return arr;    }}