/*
jQuery Browser Plugin
	* Version 1.1
	* 2009-03-09
	* URL: http://www.homeofthehip.com
	* Description: jQuery hashtable extension.
	* Author: Magnus Dunker
	* Copyright: Copyright (c) 2009 Magnus Dunker. Use it anyway you like
	*/

jQuery.Hashtable = function() {
	this.items=new Array();
	this.itemsCount=0;

	this.add = function(key,value) 	{
		if(!this.containsKey(key)) {
			this.items[key]=value;
			this.itemsCount++;
		}
		else {
			throw "key '"+key+"' already exists."
		}
	}
	this.get = function(key) {
		if(this.containsKey(key))
			return this.items[key];
		else
			return null;
	}
	this.set = function(key, value) {
		if(this.containsKey(key))
			this.items[key]=value;
		else
			this.add(key, value);
	}
	this.remove = function(key) {
		if(this.containsKey(key)) {
			delete this.items[key];
			this.itemsCount--;
		}
		else
			throw "key '"+key+"' does not exists."
	}
	this.containsKey = function(key) {
		return typeof(this.items[key])!="undefined";
	}
	this.containsValue = function containsValue(value) {
		for (var item in this.items) {
			if(this.items[item]==value)
				return true;
		}
		return false;
	}
	this.contains = function(keyOrValue) {
		return this.containsKey(keyOrValue) || this.containsValue(keyOrValue);
	}
	this.clear = function() {
		this.items=new Array();
		this.itemsCount=0;
	}
	this.size = function() {
		return this.itemsCount;
	}
	this.isEmpty = function() {
		return this.size()==0;
	}
};