var AJAX_TAG = 'div';
var AJAX_HTML = 'AjaxHTML';
var AJAX_RENDER_BLOCKS = 'AjaxRenderBlocks';
var AJAX_NAME_LINK = 'AjaxCall';
var AJAX_POST_FUNCTION = 'AjaxCall';
var AJAX_POST_BLOCKS = 'AjaxCallBlocks';
var AJAX_POST_URL = 'AjaxCallURL';

var AjaxCallURL = window.location.href;

function showAjaxError(str) {
	if(AJAX_DEBUG)
		alert(str);
}

function AjaxRunJS(Element)
{
	var arr_scripts = Element.getElementsByTagName("script");
	for(var i in arr_scripts) {
		var script = arr_scripts[i];
		var src = script.src;
		if(src!=null) {
			var has_question = (src.indexOf('?', 1)>0 ? true : false );
			if(src.length==0){
				script.setAttribute('src', '');}
			else{alert(src);
				script.setAttribute('src', script.src + (has_question==true ? '&' : '?') + '1=1');}
		}
	}
}


addEvent(window, 'load', AjaxInitLinks);
function AjaxInitLinks() {
	var as = document.getElementsByTagName('a');
	for(var i=0; i<as.length; i++) {
		var a = as[i];
		var str = a.href.split('#');
		if(str[1]) {
			var str1 = str[1].split(':');
			if(str1[0]==AJAX_NAME_LINK && str1[1]) {
				a.href = str[0];
				a.AjaxCall = str1[1];
				addEvent(a, 'click', AjaxOnClick);
			}
		}
	}
}

function AjaxOnClick(event) {
	/*if (window.event) {
		event = window.event;
		event.returnValue = false;
	} else
		event.preventDefault();*/
	
	var a;
	if(event.target)
		a = event.target; 
	else
		a = event.srcElement;
	
	if(a.tagName!='A')
		a = a.parentNode;
	if(a.tagName!='A' || !a.AjaxCall)
		return;
	
	if(AjaxCall(a.AjaxCall, null, a.href, a)) {
		if (window.event) {
			event = window.event;
			event.returnValue = false;
		} else
			event.preventDefault();
	}
}

function AjaxCall(Func, post, url, src) {
	url = url? url : AjaxCallURL;
	var post1 = AJAX_POST_FUNCTION + '=' + Func;
	post = post? ('&' + post1) : post1;
	
	if(Func==AJAX_RENDER_BLOCKS)
		post+= AjaxAddPostRenderBlocks();
	
	//document.body.style.cursor = 'wait';
	var link = new ajax(url, {method: 'post', postBody: post, update: src, onComplete: AjaxCallComplete});
	if(link.transport)
		return true;
	return false;
}

function AjaxCallComplete(request, src) {
	//document.body.style.cursor = '';
	if(request.status == 200) {
		if(src && src.AjaxCall==AJAX_RENDER_BLOCKS) {
			if(request.responseText.substr(0, 8)=='Replace ') {
				var id = request.responseText.split('\n');
				id = id[0];
				var text = request.responseText.substr(id.length+1);
				var id = id.substr(8);
				var div = document.getElementById(id);
				if(div) {
					var span = document.createElement('span');
					span.innerHTML = ''+text+'';
					div.parentNode.replaceChild(span.firstChild, div);
					setTimeout('AjaxRunJS(document.getElementById("'+id+'"))', 100);// Даем Ослу время на раздумья...
					AjaxCallURL = src.href;
					AjaxInitLinks();
					//span.removeNode(true);
				}
				return;
			}
		}
		if(AJAX_DEBUG)
			document.body.innerHTML = request.responseText;
	} else if(AJAX_DEBUG)
		document.body.innerHTML = 'Error status: ' + request.status;
	if(src && src.AjaxCall==AJAX_RENDER_BLOCKS && !AJAX_DEBUG)
		window.location.href = src.href;
}

function AjaxAddPostRenderBlocks() {
	var Items = document.getElementsByTagName('div');
	var name = AJAX_HTML + '[Action:';// без $ModuleID и $ActionType
	for(var i=0; i<Items.length; i++) {
		if(Items[i].id.substr(0, name.length)==name) {
			var Items = Items[i].getElementsByTagName('div');
			var name = AJAX_HTML + '[ArticleBlock:';
			var ret = '&' + AJAX_POST_BLOCKS + '=';
			for(var i=0; i<Items.length; i++) {
				if(Items[i].id.substr(0, name.length)==name) {
					var id = Items[i].id;
					id = id.substr(name.length, id.length-name.length-1);
					ret+= id + '%2c';
				}
			}
			var href = AjaxCallURL.substr(7, AjaxCallURL.length);
			href = href.substr(href.indexOf('/'), AjaxCallURL.length);
			return (ret.substr(0, ret.length-3) + '&' + AJAX_POST_URL + '=' + href).replace(/\//g, '%2f');
		}
	}
	showAjaxError('Not find Action block!');
	return '';
}


ajax = function(url, options){return this.initialize(url, options)};
ajax.prototype = {
	initialize: function(url, options){
		this.transport = this.getTransport();
		this.postBody = options.postBody || '';
		this.method = options.method || 'post';
		this.onComplete = options.onComplete || null;
		this.update = $(options.update) || null;
		this.request(url);
	},

	request: function(url){
		this.transport.open(this.method, url, true);
		this.transport.onreadystatechange = this.onStateChange.bind(this);
		if (this.method == 'post') {
			this.transport.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
			if (this.transport.overrideMimeType) this.transport.setRequestHeader('Connection', 'close');
		}
		this.transport.send(this.postBody);
	},

	onStateChange: function(){
		if (this.transport.readyState == 4 && this.transport.status == 200) {
			if (this.onComplete) 
				setTimeout(function(){this.onComplete(this.transport, this.update);}.bind(this), 10);
			//if (this.update)
				//setTimeout(function(){this.update.innerHTML = this.transport.responseText;}.bind(this), 10);
			this.transport.onreadystatechange = function(){};
		}
	},

	getTransport: function() {
		if (window.ActiveXObject) return new ActiveXObject('Microsoft.XMLHTTP');
		else if (window.XMLHttpRequest) return new XMLHttpRequest();
		else return false;
	}
};