//定义map

function Map() {

	this.container = {};

}

//将key-value放入map中

Map.prototype.put = function(key, value) {

	try {

		if (key != null && key != "")

			this.container[key] = value;

	} catch (e) {

		return e;

	}

};

//根据key从map中取出对应的value

Map.prototype.get = function(key) {

	try {

		return this.container[key];

	} catch (e) {

		return e;

	}

};

//判断map中是否包含指定的key

Map.prototype.containsKey = function(key) {

	try {

		for ( var p in this.container) {

			if (p == key)

				return true;

		}

		return false;

	} catch (e) {

		return e;

	}

}

//判断map中是否包含指定的value

Map.prototype.containsValue = function(value) {

	try {

		for ( var p in this.container) {

			if (this.container[p] === value)

				return true;

		}

		return false;

	} catch (e) {

		return e;

	}

};

//删除map中指定的key

Map.prototype.remove = function(key) {

	try {

		delete this.container[key];

	} catch (e) {

		return e;

	}

};

//清空map

Map.prototype.clear = function() {

	try {

		delete this.container;

		this.container = {};

	} catch (e) {

		return e;

	}

};

//判断map是否为空

Map.prototype.isEmpty = function() {

	if (this.keySet().length == 0)

		return true;

	else

		return false;

};

//获取map的大小

Map.prototype.size = function() {

	return this.keySet().length;

}

//返回map中的key值数组

Map.prototype.keySet = function() {

	var keys = new Array();

	for ( var p in this.container) {

		keys.push(p);

	}

	return keys;

}

//返回map中的values值数组

Map.prototype.values = function() {

	var valuesArray = new Array();

	var keys = this.keySet();

	for (var i = 0; i < keys.length; i++) {

		valuesArray.push(this.container[keys[i]]);

	}

	return valuesArray;

}

//返回 map 中的 entrySet 对象

Map.prototype.entrySet = function() {

	var array = new Array();

	var keys = this.keySet();

	for (var i = 0; i < keys.length; i++) {

		array.push(keys[i],this.container[keys[i]]);

	}

	return array;

}

//返回 map 中的 value值的和(当值是 Nunmber 类型时有效)

Map.prototype.sumValues = function() {

	var values = this.values();

	var result = 0;

	for (var i = 0; i < values.length; i++) {

		result += Number(values[i]);

	}

	return result;

}

///计算两个整数的百分比值

function toPercent(num, total){

	num = parseFloat(num);

	total = parseFloat(total);

	if (isNaN(num) || isNaN(total)) {

		return "0";

	}

	return total <= 0 ? "0%" : (Math.round(num / total * 10000) / 100.00 + "%");

//	return (Math.round(this * 10000)/100).toFixed(2) + '%';

}