用js写了一个Map，带遍历功能，请大家点评下啦。

//map.js

Array.prototype.remove = function(s) {	for (var i = 0; i < this.length; i++) {		if (s == this[i])			this.splice(i, 1);	}}/** * Simple Map *  *  * var m = new Map(); * m.put('key','value'); * ... * var s = ""; * m.each(function(key,value,index){ * 		s += index+":"+ key+"="+value+"\n"; * }); * alert(s); *  * @author dewitt * @date 2008-05-24 */function Map() {	/** 存放键的数组(遍历用到) */	this.keys = new Array();	/** 存放数据 */	this.data = new Object();		/**	 * 放入一个键值对	 * @param {String} key	 * @param {Object} value	 */	this.put = function(key, value) {		if(this.data[key] == null){			this.keys.push(key);		}		this.data[key] = value;	};		/**	 * 获取某键对应的值	 * @param {String} key	 * @return {Object} value	 */	this.get = function(key) {		return this.data[key];	};		/**	 * 删除一个键值对	 * @param {String} key	 */	this.remove = function(key) {		this.keys.remove(key);		this.data[key] = null;	};		/**	 * 遍历Map,执行处理函数	 * 	 * @param {Function} 回调函数 function(key,value,index){..}	 */	this.each = function(fn){		if(typeof fn != 'function'){			return;		}		var len = this.keys.length;		for(var i=0;i

　　//testMap.htm