var Request = new Class({
	Extends: Request,
	
	send: function(options){
		this.options = new Hash(this.options);
		
		if (this.options.method === 'get') {
			if ($type(this.options.data) === 'string') {
				this.options.set('data', this.options.get('data') + '&ms=' + $time());
			}
			else {
				this.options.set('data', 'ms=' + $time());
			}
		}

		
		if (!this.check(options)) return this;
		this.running = true;

		var type = $type(options);
		if (type == 'string' || type == 'element') options = {data: options};

		var old = this.options;
		options = $extend({data: old.data, url: old.url, method: old.method}, options);
		var data = options.data, url = options.url, method = options.method.toLowerCase();

		switch ($type(data)){
			case 'element': data = document.id(data).toQueryString(); break;
			case 'object': case 'hash': data = Hash.toQueryString(data);
		}

		if (this.options.format){
			var format = 'format=' + this.options.format;
			data = (data) ? format + '&' + data : format;
		}

		if (this.options.emulation && !['get', 'post'].contains(method)){
			var _method = '_method=' + method;
			data = (data) ? _method + '&' + data : _method;
			method = 'post';
		}

		if (this.options.urlEncoded && method == 'post'){
			var encoding = (this.options.encoding) ? '; charset=' + this.options.encoding : '';
			this.headers.set('Content-type', 'application/x-www-form-urlencoded' + encoding);
		}

		if (this.options.noCache){
			var noCache = 'noCache=' + new Date().getTime();
			data = (data) ? noCache + '&' + data : noCache;
		}

		var trimPosition = url.lastIndexOf('/');
		if (trimPosition > -1 && (trimPosition = url.indexOf('#')) > -1) url = url.substr(0, trimPosition);

		if (data && method == 'get'){
			url = url + (url.contains('?') ? '&' : '?') + data;
			data = null;
		}

		this.xhr.open(method.toUpperCase(), url, this.options.async);

		this.xhr.onreadystatechange = this.onStateChange.bind(this);

		this.headers.each(function(value, key){
			try {
				this.xhr.setRequestHeader(key, value);
			} catch (e){
				this.fireEvent('exception', [key, value]);
			}
		}, this);

		this.fireEvent('request');
		this.xhr.send(data);
		if (!this.options.async) this.onStateChange();
		return this;
	}
});

//getdata
var getQueryString = function () {
	// This function is anonymous, is executed immediately and
	// the return value is assigned to QueryString!
	var query_string = {};
	var query = window.location.search.substring(1);
	var vars = query.split("&");
	for (var i=0;i<vars.length;i++) {
		var pair = vars[i].split("=");
		// If first entry with this name
		if (typeof query_string[pair[0]] === "undefined") {
			query_string[pair[0]] = pair[1];
			// If second entry with this name
    	}
		else if (typeof query_string[pair[0]] === "string") {
			var arr = [ query_string[pair[0]], pair[1] ];
			query_string[pair[0]] = arr;
			// If third or later entry with this name
		} 
		else {
			query_string[pair[0]].push(pair[1]);
		}
	}
	return query_string;
};

window.queryString = getQueryString();