/**
 * apply method »ç¿ë
 * À̺¥Æ®¹ß»ý½Ã ÇÔ¼ö¿¡ Àü´ÞÇÒ¶§ Ŭ·¡½º¾ÈÀÇ this ¸¦ Æ÷ÇÔÇÑ´Ù.
 */
Function.prototype.bind = function()
{
	for ( var i = 0, method = this , args = [] , len = arguments.length ; i < len ; i++ )
    {
		args.push( arguments[ i ] );
    }
	return function()
    {
        return method.apply( args[0] , args.slice(1) );
    }
}

function debug(o, options)
{
	// check
	if( o == null ) return;
	if( typeof options == 'undefined' ) options = {pos: false};

	// process
	if( typeof o == 'string' || typeof o == 'number' )
	{
		var debugStr = o;
	}
	else
	{
		// process #2
		var debugStr = '<table border="1">';
		for( i in o )
		{
			//if( o[i] == '[object HTMLFormElement]' ) continue;
			debugStr += '<tr><td><b>' + i + '</b></td><td>' + o[i] + '</td><td>' + typeof o[i] + '</td></tr>';

			if( options.optSub == 1 )
			{
				if( typeof o[i] == 'object' )
				{
					for( j in o[i] )
					{
						debugStr += '======>' + j + '=' + o[i][j] + '<br>';
					}
				}
			}
		}
		debugStr += '</table>';
		if( options.cookie == true ) debugStr += 'document.cookie:' + document.cookie + '<br>';
	}

	var divObj = document.createElement('div');
	divObj.id = 'debug';
	if( options.pos == true )
	{
		divObj.style.position = 'absolute';
		divObj.style.top = ( options.top || 0 ) + 'px';
		divObj.style.left = ( options.left || 500 ) + 'px';
		divObj.style.zIndex = options.zIndex || 10000;
	}
	divObj.innerHTML = debugStr;
	document.body.appendChild(divObj);
}

var xhr = {
	instance: false,
	init: function()
	{
		if( typeof XMLHttpRequest != 'undefined' )
		{
			this.instance = new XMLHttpRequest();
		}
		if( !this.instance )
		{
			try
			{
				this.instance = new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch(e)
			{
				try
				{
					this.instance = new ActiveXObject("Microsoft.XMLHTTP");
				}
				catch(e)
				{
					this.instance = false;
				}
			}
		}

		return this.instance;
	}
}

/**
 * ¿ÀºêÁ§Æ® È®Àå
 * @param {Object} destination
 * @param {Object} source
 * @return {Object}
 * @author ¹Ú³­ÇÏ nanhap@gmail.com
 * @date 2007-03-09
 */
Object.extend = function(destination, source)
{
	for(var property in source)
	{
		destination[property] = source[property];
	}
	return destination;
}

/**
 * Ajax
 * @author ¹Ú³­ÇÏ
 * @date 2007-02-22 ¿ÀÈÄ 5:46
 */
var Ajax = {
	Events: ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'], // readyState ¿¡ ´ëÇÑ À̺¥Æ®¸í
	setOptions: {
		method: 'post',
		asynchronous: true,
		contentType: 'application/x-www-form-urlencoded',
		encoding: 'UTF-8',
		parameters: ''
	}, // ±âº» ¿É¼Ç

	/**
	 * ½ÇÇàÇÔ¼ö
	 * @param {String} url
	 * @param {Object object} options ¿É¼Ç JSON
	 */
	init: function(url, options)
	{
		this.url = url;
		this.xhrObj = xhr.init();
		Object.extend(this.setOptions, options || {});
		this.request();
	},

	/**
	 * ¿äû
	 */
	request: function()
	{
		// when GET, append parameters to URL
		//var params = encodeURIComponent(this.setOptions.parameters);
		var params = this.setOptions.parameters;
		if( this.setOptions.method == 'get' && params )
		this.url += (this.url.indexOf('?') > -1 ? '&' : '?') + params;

		try {
			if(typeof this.onCreate == 'function') this.onCreate(); // ÃÖÃÊÇÔ¼ö ½ÇÇà
			this.xhrObj.open(this.setOptions.method, this.url, this.setOptions.asynchronous);
			this.xhrObj.onreadystatechange = this.onStateChange.bind(this);
			this.header();

			var body = this.setOptions.method == 'post' ? (this.setOptions.postBody || params) : null;
			this.xhrObj.send(body);

			/* Force Firefox to handle ready state for synchronous requests */
			if( !this.setOptions.asynchronous && this.xhrObj.overrideMimeType )
				this.onStateChange();
		}
		catch(e) {
			debug(e);
		}
	},

	/**
	 * Çì´õ¼±¾ð
	 */
	header: function()
	{
		var headers = {};
		headers['X-Requested-With'] = 'XMLHttpRequest';	//ajax ¿äû¿©ºÎ heade°ª Ãß°¡
		if(this.setOptions.method == 'post')
		{
			headers['Content-Type'] = this.setOptions.contentType + ( this.setOptions.encoding ? '; charset=' + this.setOptions.encoding : '' );
		}

		for(var name in headers)
			this.xhrObj.setRequestHeader(name, headers[name]);
	},

	/**
	 * monitor
	 */
	onStateChange: function()
	{
		//if( this.xhrObj.readyState > 1 && !( this.xhrObj.readyState == 4 && this._complete ) )
		if( this.xhrObj.readyState > 1 )
			this.respond(this.xhrObj.readyState);
	},

	/**
	 * ¿äû ¿Ï·á
	 */
	success: function() {
		return !this.xhrObj.status
		|| (this.xhrObj.status >= 200 && this.xhrObj.status < 300);
	},

	/**
	 * ¿äû»óź° üũ
	 * @param {String} readyState
	 */
	respond: function(readyState)
	{
		var state = this.Events[readyState];

		if( state == 'Complete' )
		{
			this._complete = true;
			var json = this.evalJSON();
			if( typeof this.setOptions.onComplete == 'function' )
			{
				this.setOptions.onComplete(this.xhrObj, json);
			}
		}
	},

	/**
	 * ¿äûÇÑ URL ¿¡ ´ëÇÑ Çì´õ¾òÀ½
	 * @param {String} name Çì´õ ±¸ºÐ°ª
	 * @return {Boolen} true/false
	 */
	getHeader: function(name) {
		try {
			return this.xhrObj.getResponseHeader(name);
		}
		catch(e) { debug(e); }

		return true;
	},

	/**
	 * JSON °ªÀ» °¡Á®¿È
	 */
	// return json type
	evalJSON: function() {
		try {
		var json = this.getHeader('X-JSON');
		return json ? eval('(' + json + ')') : null;
		} catch (e) { return null }
	}
}