/*
Copyright (c) 2007, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.net/yui/license.txt
version: 2.3.0
*/

YAHOO.util.Connect = {_msxml_progid:["MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"], _http_headers:{}, _has_http_headers:false, _use_default_post_header:true, _default_post_header:"application/x-www-form-urlencoded; charset=UTF-8", _use_default_xhr_header:true, _default_xhr_header:"XMLHttpRequest", _has_default_headers:true, _default_headers:{}, _isFormSubmit:false, _isFileUpload:false, _formNode:null, _sFormData:null, _poll:{}, _timeOut:{}, _polling_interval:50, _transaction_id:0, _submitElementValue:null, _hasSubmitListener:(function () {
	if (YAHOO.util.Event) {
		YAHOO.util.Event.addListener(document, "click", function (e) {
			var obj = YAHOO.util.Event.getTarget(e);
			if (obj.type == "submit") {
				YAHOO.util.Connect._submitElementValue = encodeURIComponent(obj.name) + "=" + encodeURIComponent(obj.value);
			}
		});
		return true;
	}
	return false;
})(), startEvent:new YAHOO.util.CustomEvent("start"), completeEvent:new YAHOO.util.CustomEvent("complete"), successEvent:new YAHOO.util.CustomEvent("success"), failureEvent:new YAHOO.util.CustomEvent("failure"), uploadEvent:new YAHOO.util.CustomEvent("upload"), abortEvent:new YAHOO.util.CustomEvent("abort"), _customEvents:{onStart:["startEvent", "start"], onComplete:["completeEvent", "complete"], onSuccess:["successEvent", "success"], onFailure:["failureEvent", "failure"], onUpload:["uploadEvent", "upload"], onAbort:["abortEvent", "abort"]}, setProgId:function (id) {
	this._msxml_progid.unshift(id);
}, setDefaultPostHeader:function (b) {
	this._use_default_post_header = b;
}, setDefaultXhrHeader:function (b) {
	this._use_default_xhr_header = b;
}, setPollingInterval:function (i) {
	if (typeof i == "number" && isFinite(i)) {
		this._polling_interval = i;
	}
}, createXhrObject:function (transactionId) {
	var obj, http;
	try {
		http = new XMLHttpRequest();
		obj = {conn:http, tId:transactionId};
	}
	catch (e) {
		for (var i = 0; i < this._msxml_progid.length; ++i) {
			try {
				http = new ActiveXObject(this._msxml_progid[i]);
				obj = {conn:http, tId:transactionId};
				break;
			}
			catch (e) {
			}
		}
	}
	finally {
		return obj;
	}
}, getConnectionObject:function (isFileUpload) {
	var o;
	var tId = this._transaction_id;
	try {
		if (!isFileUpload) {
			o = this.createXhrObject(tId);
		} else {
			o = {};
			o.tId = tId;
			o.isUpload = true;
		}
		if (o) {
			this._transaction_id++;
		}
	}
	catch (e) {
	}
	finally {
		return o;
	}
}, asyncRequest:function (method, uri, callback, postData) {
	var o = (this._isFileUpload) ? this.getConnectionObject(true) : this.getConnectionObject();
	if (!o) {
		return null;
	} else {
		if (callback && callback.customevents) {
			this.initCustomEvents(o, callback);
		}
		if (this._isFormSubmit) {
			if (this._isFileUpload) {
				this.uploadFile(o, callback, uri, postData);
				return o;
			}
			if (method.toUpperCase() == "GET") {
				if (this._sFormData.length !== 0) {
					uri += ((uri.indexOf("?") == -1) ? "?" : "&") + this._sFormData;
				} else {
					uri += "?" + this._sFormData;
				}
			} else {
				if (method.toUpperCase() == "POST") {
					postData = postData ? this._sFormData + "&" + postData : this._sFormData;
				}
			}
		}
		o.conn.open(method, uri, true);
		if (this._use_default_xhr_header) {
			if (!this._default_headers["X-Requested-With"]) {
				this.initHeader("X-Requested-With", this._default_xhr_header, true);
			}
		}
		if (this._isFormSubmit || (postData && this._use_default_post_header)) {
			this.initHeader("Content-Type", this._default_post_header);
			if (this._isFormSubmit) {
				this.resetFormState();
			}
		}
		if (this._has_default_headers || this._has_http_headers) {
			this.setHeader(o);
		}
		this.handleReadyState(o, callback);
		o.conn.send(postData || null);
		this.startEvent.fire(o);
		if (o.startEvent) {
			o.startEvent.fire(o);
		}
		return o;
	}
}, initCustomEvents:function (o, callback) {
	for (var prop in callback.customevents) {
		if (this._customEvents[prop][0]) {
			o[this._customEvents[prop][0]] = new YAHOO.util.CustomEvent(this._customEvents[prop][1], (callback.scope) ? callback.scope : null);
			o[this._customEvents[prop][0]].subscribe(callback.customevents[prop]);
		}
	}
}, handleReadyState:function (o, callback) {
	var oConn = this;
	if (callback && callback.timeout) {
		this._timeOut[o.tId] = window.setTimeout(function () {
			oConn.abort(o, callback, true);
		}, callback.timeout);
	}
	this._poll[o.tId] = window.setInterval(function () {
		if (o.conn && o.conn.readyState === 4) {
			window.clearInterval(oConn._poll[o.tId]);
			delete oConn._poll[o.tId];
			if (callback && callback.timeout) {
				window.clearTimeout(oConn._timeOut[o.tId]);
				delete oConn._timeOut[o.tId];
			}
			oConn.completeEvent.fire(o);
			if (o.completeEvent) {
				o.completeEvent.fire(o);
			}
			oConn.handleTransactionResponse(o, callback);
		}
	}, this._polling_interval);
}, handleTransactionResponse:function (o, callback, isAbort) {
	if (!callback) {
		this.releaseObject(o);
		return;
	}
	var httpStatus, responseObject;
	try {
		if (o.conn.status !== undefined && o.conn.status !== 0) {
			httpStatus = o.conn.status;
		} else {
			httpStatus = 13030;
		}
	}
	catch (e) {
		httpStatus = 13030;
	}
	if (httpStatus >= 200 && httpStatus < 300 || httpStatus === 1223) {
		responseObject = this.createResponseObject(o, callback.argument);
		if (callback.success) {
			if (!callback.scope) {
				callback.success(responseObject);
			} else {
				callback.success.apply(callback.scope, [responseObject]);
			}
		}
		this.successEvent.fire(responseObject);
		if (o.successEvent) {
			o.successEvent.fire(responseObject);
		}
	} else {
		switch (httpStatus) {
		  case 12002:
		  case 12029:
		  case 12030:
		  case 12031:
		  case 12152:
		  case 13030:
			responseObject = this.createExceptionObject(o.tId, callback.argument, (isAbort ? isAbort : false));
			if (callback.failure) {
				if (!callback.scope) {
					callback.failure(responseObject);
				} else {
					callback.failure.apply(callback.scope, [responseObject]);
				}
			}
			break;
		  default:
			responseObject = this.createResponseObject(o, callback.argument);
			if (callback.failure) {
				if (!callback.scope) {
					callback.failure(responseObject);
				} else {
					callback.failure.apply(callback.scope, [responseObject]);
				}
			}
		}
		this.failureEvent.fire(responseObject);
		if (o.failureEvent) {
			o.failureEvent.fire(responseObject);
		}
	}
	this.releaseObject(o);
	responseObject = null;
}, createResponseObject:function (o, callbackArg) {
	var obj = {};
	var headerObj = {};
	try {
		var headerStr = o.conn.getAllResponseHeaders();
		var header = headerStr.split("\n");
		for (var i = 0; i < header.length; i++) {
			var delimitPos = header[i].indexOf(":");
			if (delimitPos != -1) {
				headerObj[header[i].substring(0, delimitPos)] = header[i].substring(delimitPos + 2);
			}
		}
	}
	catch (e) {
	}
	obj.tId = o.tId;
	obj.status = (o.conn.status == 1223) ? 204 : o.conn.status;
	obj.statusText = (o.conn.status == 1223) ? "No Content" : o.conn.statusText;
	obj.getResponseHeader = headerObj;
	obj.getAllResponseHeaders = headerStr;
	obj.responseText = o.conn.responseText;
	obj.responseXML = o.conn.responseXML;
	if (typeof callbackArg !== undefined) {
		obj.argument = callbackArg;
	}
	return obj;
}, createExceptionObject:function (tId, callbackArg, isAbort) {
	var COMM_CODE = 0;
	var COMM_ERROR = "communication failure";
	var ABORT_CODE = -1;
	var ABORT_ERROR = "transaction aborted";
	var obj = {};
	obj.tId = tId;
	if (isAbort) {
		obj.status = ABORT_CODE;
		obj.statusText = ABORT_ERROR;
	} else {
		obj.status = COMM_CODE;
		obj.statusText = COMM_ERROR;
	}
	if (callbackArg) {
		obj.argument = callbackArg;
	}
	return obj;
}, initHeader:function (label, value, isDefault) {
	var headerObj = (isDefault) ? this._default_headers : this._http_headers;
	if (headerObj[label] === undefined) {
		headerObj[label] = value;
	} else {
		headerObj[label] = value + "," + headerObj[label];
	}
	if (isDefault) {
		this._has_default_headers = true;
	} else {
		this._has_http_headers = true;
	}
}, setHeader:function (o) {
	if (this._has_default_headers) {
		for (var prop in this._default_headers) {
			if (YAHOO.lang.hasOwnProperty(this._default_headers, prop)) {
				o.conn.setRequestHeader(prop, this._default_headers[prop]);
			}
		}
	}
	if (this._has_http_headers) {
		for (var prop in this._http_headers) {
			if (YAHOO.lang.hasOwnProperty(this._http_headers, prop)) {
				o.conn.setRequestHeader(prop, this._http_headers[prop]);
			}
		}
		delete this._http_headers;
		this._http_headers = {};
		this._has_http_headers = false;
	}
}, resetDefaultHeaders:function () {
	delete this._default_headers;
	this._default_headers = {};
	this._has_default_headers = false;
}, setForm:function (formId, isUpload, secureUri) {
	this.resetFormState();
	var oForm;
	if (typeof formId == "string") {
		oForm = (document.getElementById(formId) || document.forms[formId]);
	} else {
		if (typeof formId == "object") {
			oForm = formId;
		} else {
			return;
		}
	}
	if (isUpload) {
		var io = this.createFrame(secureUri ? secureUri : null);
		this._isFormSubmit = true;
		this._isFileUpload = true;
		this._formNode = oForm;
		return;
	}
	var oElement, oName, oValue, oDisabled;
	var hasSubmit = false;
	for (var i = 0; i < oForm.elements.length; i++) {
		oElement = oForm.elements[i];
		oDisabled = oForm.elements[i].disabled;
		oName = oForm.elements[i].name;
		oValue = oForm.elements[i].value;
		if (!oDisabled && oName) {
			switch (oElement.type) {
			  case "select-one":
			  case "select-multiple":
				for (var j = 0; j < oElement.options.length; j++) {
					if (oElement.options[j].selected) {
						if (window.ActiveXObject) {
							this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oElement.options[j].attributes["value"].specified ? oElement.options[j].value : oElement.options[j].text) + "&";
						} else {
							this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oElement.options[j].hasAttribute("value") ? oElement.options[j].value : oElement.options[j].text) + "&";
						}
					}
				}
				break;
			  case "radio":
			  case "checkbox":
				if (oElement.checked) {
					this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oValue) + "&";
				}
				break;
			  case "file":
			  case undefined:
			  case "reset":
			  case "button":
				break;
			  case "submit":
				if (hasSubmit === false) {
					if (this._hasSubmitListener && this._submitElementValue) {
						this._sFormData += this._submitElementValue + "&";
					} else {
						this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oValue) + "&";
					}
					hasSubmit = true;
				}
				break;
			  default:
				this._sFormData += encodeURIComponent(oName) + "=" + encodeURIComponent(oValue) + "&";
			}
		}
	}
	this._isFormSubmit = true;
	this._sFormData = this._sFormData.substr(0, this._sFormData.length - 1);
	return this._sFormData;
}, resetFormState:function () {
	this._isFormSubmit = false;
	this._isFileUpload = false;
	this._formNode = null;
	this._sFormData = "";
}, createFrame:function (secureUri) {
	var frameId = "yuiIO" + this._transaction_id;
	var io;
	if (window.ActiveXObject) {
		io = document.createElement("<iframe id=\"" + frameId + "\" name=\"" + frameId + "\" />");
		if (typeof secureUri == "boolean") {
			io.src = "javascript:false";
		} else {
			if (typeof secureURI == "string") {
				io.src = secureUri;
			}
		}
	} else {
		io = document.createElement("iframe");
		io.id = frameId;
		io.name = frameId;
	}
	io.style.position = "absolute";
	io.style.top = "-1000px";
	io.style.left = "-1000px";
	document.body.appendChild(io);
}, appendPostData:function (postData) {
	var formElements = [];
	var postMessage = postData.split("&");
	for (var i = 0; i < postMessage.length; i++) {
		var delimitPos = postMessage[i].indexOf("=");
		if (delimitPos != -1) {
			formElements[i] = document.createElement("input");
			formElements[i].type = "hidden";
			formElements[i].name = postMessage[i].substring(0, delimitPos);
			formElements[i].value = postMessage[i].substring(delimitPos + 1);
			this._formNode.appendChild(formElements[i]);
		}
	}
	return formElements;
}, uploadFile:function (o, callback, uri, postData) {
	var frameId = "yuiIO" + o.tId;
	var uploadEncoding = "multipart/form-data";
	var io = document.getElementById(frameId);
	var oConn = this;
	var rawFormAttributes = {action:this._formNode.getAttribute("action"), method:this._formNode.getAttribute("method"), target:this._formNode.getAttribute("target")};
	this._formNode.setAttribute("action", uri);
	this._formNode.setAttribute("method", "POST");
	this._formNode.setAttribute("target", frameId);
	if (this._formNode.encoding) {
		this._formNode.setAttribute("encoding", uploadEncoding);
	} else {
		this._formNode.setAttribute("enctype", uploadEncoding);
	}
	if (postData) {
		var oElements = this.appendPostData(postData);
	}
	this._formNode.submit();
	this.startEvent.fire(o);
	if (o.startEvent) {
		o.startEvent.fire(o);
	}
	if (callback && callback.timeout) {
		this._timeOut[o.tId] = window.setTimeout(function () {
			oConn.abort(o, callback, true);
		}, callback.timeout);
	}
	if (oElements && oElements.length > 0) {
		for (var i = 0; i < oElements.length; i++) {
			this._formNode.removeChild(oElements[i]);
		}
	}
	for (var prop in rawFormAttributes) {
		if (YAHOO.lang.hasOwnProperty(rawFormAttributes, prop)) {
			if (rawFormAttributes[prop]) {
				this._formNode.setAttribute(prop, rawFormAttributes[prop]);
			} else {
				this._formNode.removeAttribute(prop);
			}
		}
	}
	this.resetFormState();
	var uploadCallback = function () {
		if (callback && callback.timeout) {
			window.clearTimeout(oConn._timeOut[o.tId]);
			delete oConn._timeOut[o.tId];
		}
		oConn.completeEvent.fire(o);
		if (o.completeEvent) {
			o.completeEvent.fire(o);
		}
		var obj = {};
		obj.tId = o.tId;
		obj.argument = callback.argument;
		try {
			obj.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : io.contentWindow.document.documentElement.textContent;
			obj.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
		}
		catch (e) {
		}
		if (callback && callback.upload) {
			if (!callback.scope) {
				callback.upload(obj);
			} else {
				callback.upload.apply(callback.scope, [obj]);
			}
		}
		oConn.uploadEvent.fire(obj);
		if (o.uploadEvent) {
			o.uploadEvent.fire(obj);
		}
		if (YAHOO.util.Event) {
			YAHOO.util.Event.removeListener(io, "load", uploadCallback);
		} else {
			if (window.detachEvent) {
				io.detachEvent("onload", uploadCallback);
			} else {
				io.removeEventListener("load", uploadCallback, false);
			}
		}
		setTimeout(function () {
			document.body.removeChild(io);
			oConn.releaseObject(o);
		}, 100);
	};
	if (YAHOO.util.Event) {
		YAHOO.util.Event.addListener(io, "load", uploadCallback);
	} else {
		if (window.attachEvent) {
			io.attachEvent("onload", uploadCallback);
		} else {
			io.addEventListener("load", uploadCallback, false);
		}
	}
}, abort:function (o, callback, isTimeout) {
	var abortStatus;
	if (o.conn) {
		if (this.isCallInProgress(o)) {
			o.conn.abort();
			window.clearInterval(this._poll[o.tId]);
			delete this._poll[o.tId];
			if (isTimeout) {
				window.clearTimeout(this._timeOut[o.tId]);
				delete this._timeOut[o.tId];
			}
			abortStatus = true;
		}
	} else {
		if (o.isUpload === true) {
			var frameId = "yuiIO" + o.tId;
			var io = document.getElementById(frameId);
			if (io) {
				document.body.removeChild(io);
				if (isTimeout) {
					window.clearTimeout(this._timeOut[o.tId]);
					delete this._timeOut[o.tId];
				}
				abortStatus = true;
			}
		} else {
			abortStatus = false;
		}
	}
	if (abortStatus === true) {
		this.abortEvent.fire(o);
		if (o.abortEvent) {
			o.abortEvent.fire(o);
		}
		this.handleTransactionResponse(o, callback, true);
	} else {
	}
	return abortStatus;
}, isCallInProgress:function (o) {
	if (o && o.conn) {
		return o.conn.readyState !== 4 && o.conn.readyState !== 0;
	} else {
		if (o && o.isUpload === true) {
			var frameId = "yuiIO" + o.tId;
			return document.getElementById(frameId) ? true : false;
		} else {
			return false;
		}
	}
}, releaseObject:function (o) {
	if (o.conn) {
		o.conn = null;
	}
	o = null;
}};
YAHOO.register("connection", YAHOO.util.Connect, {version:"2.3.0", build:"442"});