function Subsys_JsHttpRequest_Js() { this._construct() }
(function() {
 var COUNT = 0;
 var PENDING = {};
 var CACHE = {};
 
 Subsys_JsHttpRequest_Js.dataReady = function(id, text, js) {
 var undef;
 var th = PENDING[id];
 delete PENDING[id];
 if (th) {
 delete th._xmlReq;
 if (th.caching) CACHE[th.hash] = [text, js];
 th._dataReady(text, js);
 } else if (typeof(th) != typeof(undef)) {
 alert("ScriptLoader: unknown pending id: "+id);
 }
 }

 Subsys_JsHttpRequest_Js.prototype = {
 onreadystatechange: null,
 readyState: 0,
 responseText: null,
 responseXML: null,
 status: 200,
 statusText: "OK",

 session_name: "PHPSESSID", 
 responseJS: null, 
 caching: false, 

 _span: null,
 _id: null,
 _xmlReq: null,
 _openArg: null,
 _reqHeaders: null,

 dummy: function() {}, 

 abort: function() {
 if (this._xmlReq) return this._xmlReq.abort();
 if (this._span) {
 this.readyState = 0;
 if (this.onreadystatechange) this.onreadystatechange();
 this._cleanupScript();
 }
 },

 open: function(method, url, asyncFlag, username, password) {
 this._openArg = {
 'method': method,
 'url': url,
 'asyncFlag': asyncFlag,
 'username': username != null? username : '',
 'password': password != null? password : ''
 };
 this._id = null;
 this._xmlReq = null;
 this._reqHeaders = [];
 return true;
 },

 send: function(content) {
 var id = (new Date().getTime()) + "" + COUNT++;

 var query = this._hash2query(content);
 var url = this._openArg.url;
 var sid = this._getSid();
 if (sid) url += (url.indexOf('?')>=0? '&' : '?') + query;
 var hash = this.hash = url + '?' + query;
 if (this.caching && CACHE[hash]) {
 var c = CACHE[hash];
 this._dataReady(c[0], c[1]);
 return false;
 }

 this._xmlReq = this._obtainXmlReq(id, url);

 var hasSetHeader = this._xmlReq && (window.ActiveXObject || this._xmlReq.setRequestHeader);
 var href, body;
 if (this._xmlReq && hasSetHeader && (""+this._openArg.method).toUpperCase() == "POST") {
 this._openArg.method = "POST";
 href = url;
 body = query;
 } else {
 this._openArg.method = "GET";
 href = url + (url.indexOf('?')>=0? '&' : '?') + query;
 body = null;
 }

 href = href + (href.indexOf('?')>=0? '&' : '?') + id;

 PENDING[id] = this;

 if (this._xmlReq) {
 
 var a = this._openArg;
 this._xmlReq.open(a.method, href+"-xml", a.asyncFlag, a.username, a.password);
 if (hasSetHeader) {
 
 for (var i=0; i<this._reqHeaders.length; i++)
 this._xmlReq.setRequestHeader(this._reqHeaders[i][0], this._reqHeaders[i][1]);
 
 this._xmlReq.setRequestHeader('Content-Type', 'application/octet-stream');
 }

 return this._xmlReq.send(body);
 } else {
 this._obtainScript(id, href);
 return true;
 }
 },

 getAllResponseHeaders: function() {
 if (this._xmlReq) return this._xmlReq.getAllResponseHeaders();
 return '';
 },

 getResponseHeader: function(label) {
 if (this._xmlReq) return this._xmlReq.getResponseHeader(label);
 return '';
 },

 setRequestHeader: function(label, value) {

 this._reqHeaders[this._reqHeaders.length] = [label, value];
 },
 _construct: function() {},

 _dataReady: function(text, js) { with (this) {
 if (text !== null || js !== null) {
 readyState = 4;
 responseText = responseXML = text;
 responseJS = js;
 } else {
 readyState = 0;
 responseText = responseXML = responseJS = null;
 }
 if (onreadystatechange) onreadystatechange();
 _cleanupScript();
 }},


 _obtainXmlReq: function(id, url) {
 
 if (url.match(new RegExp('^[a-z]+://', 'i'))) return null;

 var req = null;
 if (window.XMLHttpRequest) {
 try { req = new XMLHttpRequest() } catch(e) {}
 } else if (window.ActiveXObject) {
 try { req = new ActiveXObject("Microsoft.XMLHTTP") } catch(e) {}
 if (!req) try { req = new ActiveXObject("Msxml2.XMLHTTP") } catch (e) {}
 }
 if (req) {
 var th = this;
 req.onreadystatechange = function() {
 var s = req.readyState;
 if (s == 4) {

 req.onreadystatechange = th.dummy;

 var responseText = req.responseText;
 try {

 eval(responseText);
 } catch (e) {
 Subsys_JsHttpRequest_Js.dataReady(id, "JavaScript code generated by backend is invalid!\n"+responseText, null);
 }
 } else {
 th.readyState = s;
 if (th.onreadystatechange) th.onreadystatechange()
 }
 };
 this._id = id;
 }
 return req;
 },


 _obtainScript: function(id, href) { with (document) {
 var span = null;
 span = body.appendChild(createElement("SPAN"));
 span.style.display = 'none';
 span.innerHTML = 'Text for stupid IE.<s'+'cript></' + 'script>';
 setTimeout(function() {
 var s = span.getElementsByTagName("script")[0];
 s.language = "JavaScript";
 if (s.setAttribute) s.setAttribute('src', href); else s.src = href;
 }, 10);
 this._id = id;
 this._span = span;
 }},

 _cleanupScript: function() {
 var span = this._span;
 if (span) {
 this._span = null;
 setTimeout(function() {
 span.parentNode.removeChild(span);
 }, 50);
 }
 return false;
 },

 _hash2query: function(content, prefix) {
 if (prefix == null) prefix = "";
 var query = [];
 if (content instanceof Object) {
 for (var k in content) {
 var v = content[k];
 if (v == null || ((v.constructor||{}).prototype||{})[k]) continue;
 var curPrefix = prefix? prefix+'['+this.escape(k)+']' : this.escape(k);
 if (v instanceof Object)
 query[query.length] = this._hash2query(v, curPrefix);
 else
 query[query.length] = curPrefix + "=" + this.escape(v);
 }
 } else {
 query = [content];
 }
 return query.join('&');
 },

 _getSid: function() {
 var m = document.location.search.match(new RegExp('[&?]'+this.session_name+'=([^&?]*)'));
 var sid = null;
 if (m) {
 sid = m[1];
 } else {
 var m = document.cookie.match(new RegExp('(;|^)\\s*'+this.session_name+'=([^;]*)'));
 if (m) sid = m[2];
 }
 return sid;
 },

 escape: function(s) {
 return escape(s).replace(new RegExp('\\+','g'), '%2B');
 }
 }
})();