/*
utilizar essa função para facilitar a busca pelos dados retonados por xml
*/
xmlParse = function() 
{
	var objAjax = null;
	var strChildName = new String('');
	var xmlReturn = null;

	this.setObjAjax = function() {
		objAjax = arguments[0];
	}

	this.setChildName = function() {
		strChildName = arguments[0];
	}

	this.getCountItens = function() {
		return xmlReturn.getElementsByTagName(strChildName).length;
	}

	this.getAttByName = function() {
		return xmlReturn.getElementsByTagName(strChildName)[arguments[1]].getAttribute(arguments[0]);
	}
	
	this.getDataByName = function() {
		return xmlReturn.getElementsByTagName(strChildName)[arguments[0]].firstChild.data;
	}

	this.parse = function() {
		xmlReturn = objAjax.responseXML;
	}
}


Connect = {
	_msxml_progid:[
			'MSXML2.XMLHTTP.4.0',
			'MSXML2.XMLHTTP.3.0',
			'MSXML2.XMLHTTP',
			'Microsoft.XMLHTTP'
			],

	_http_header:{},
	_has_http_headers:false,
    _default_post_header:true,
    _isFormSubmit:false,
    _isFileUpload:false,
    _formNode:null,
    _sFormData:null,
	_poll:[],
    _timeOut:[],
     _polling_interval:50,
     _transaction_id:0,

	setDefaultPostHeader:function(b){
		this._default_post_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(){
		var o;
		var tId = this._transaction_id;
		try{
			o = this.createXhrObject(tId);
			if(o)this._transaction_id++;
		}catch(e){}
		finally{return o;}
	},

	asyncRequest:function(method, uri, callback, postData){
		//postData -> passar qdo for POST, senao passar as vars na url qdo for GET
		var o = this.getConnectionObject();

		if(!o){
			return null;
		}else{
			if(this._isFormSubmit){
				if(method == 'GET'){
					uri += "?" +  this._sFormData;
				}else if(method == 'POST'){
					postData = this._sFormData;
				}
				this._sFormData = '';
			}

			o.conn.open(method, uri, true);

			if(this._isFormSubmit || (postData && this._default_post_header)){
				this.initHeader('Content-Type','application/x-www-form-urlencoded');
				if(this._isFormSubmit)this._isFormSubmit = false;
			}

			if(this._has_http_headers)this.setHeader(o);

			this.handleReadyState(o, callback);
			postData?o.conn.send(postData):o.conn.send(null);

			return o;
		}
	},

    handleReadyState:function(o, callback){
        var timeOut = callback.timeout;
        var oConn = this;

        try{
            if(timeOut !== undefined){
            	this._timeOut[o.tId] = window.setTimeout(function(){ oConn.abort(o, callback, true) }, timeOut);
            }
            this._poll[o.tId] = window.setInterval(
                function(){
					if(o.conn && o.conn.readyState == 4){
						window.clearInterval(oConn._poll[o.tId]);
						oConn._poll.splice(o.tId);
						if(timeOut)oConn._timeOut.splice(o.tId);

						oConn.handleTransactionResponse(o, callback);
                    }
                }
            ,this._polling_interval);
        }
		catch(e){
            window.clearInterval(oConn._poll[o.tId]);
            oConn._poll.splice(o.tId);

			if(timeOut)oConn._timeOut.splice(o.tId);

            oConn.handleTransactionResponse(o, callback);
        }
    },

    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){
			responseObject = this.createResponseObject(o, callback.argument);
			if(callback.success){
				if(!callback.scope) callback.success(responseObject);
				else callback.success.apply(callback.scope, [responseObject]);
			}
		}else{
			switch(httpStatus){
				case 12002:
				case 12029:
				case 12030:
				case 12031:
				case 12152:
				case 13030:
					responseObject = this.createExceptionObject(o.tId, callback.argument, isAbort);
					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.releaseObject(o);
    },

    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+1);
			}
		}catch(e){}

		obj.tId = o.tId;
		obj.status = o.conn.status;
		obj.statusText = 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){
		if(this._http_header[label] === undefined) this._http_header[label] = value;
		else this._http_header[label] =  value + "," + this._http_header[label];

		this._has_http_headers = true;
	},

	setHeader:function(o){
		for(var prop in this._http_header){
			if(this._http_header.propertyIsEnumerable)o.conn.setRequestHeader(prop, this._http_header[prop]);
		}
		delete this._http_header;

		this._http_header = {};
		this._has_http_headers = false;
	},

	setForm:function(formId, isUpload, secureUri){
		this._sFormData = '';
		if(typeof formId == 'string'){
			var oForm = (document.getElementById(formId) || document.forms[formId]);
		}else if(typeof formId == 'object'){
			var oForm = formId;
		}else{
			return;
		}

		var oElement, oName, oValue, oDisabled;
		var hasSubmit = false;

		for (var i=0; i<oForm.elements.length; i++){
			oDisabled = oForm.elements[i].disabled;

			oElement = oForm.elements[i];
			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)this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(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){
							this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
							hasSubmit = true;
						}
						break;
					default:
						this._sFormData += encodeURIComponent(oName) + '=' + encodeURIComponent(oValue) + '&';
						break;
				}
			}
		}

		this._isFormSubmit = true;
		this._sFormData = this._sFormData.substr(0, this._sFormData.length - 1);
	},

	createFrame:function(secureUri){
		if(window.ActiveXObject){
			var io = document.createElement('<IFRAME name="ioFrame" id="ioFrame">');
			if(secureUri)io.src = secureUri;
		}else{
			var io = document.createElement('IFRAME');
			io.id = 'ioFrame';
			io.name = 'ioFrame';
		}
		io.style.position = 'absolute';
		io.style.top = '-1000px';
		io.style.left = '-1000px';
		document.body.appendChild(io);
	},

	abort:function(o, callback, isTimeout){
		if(this.isCallInProgress(o)){
			window.clearInterval(this._poll[o.tId]);
			this._poll.splice(o.tId);
			if(isTimeout)this._timeOut.splice(o.tId);
			o.conn.abort();
			this.handleTransactionResponse(o, callback, true);
			return true;
		}else{
			return false;
		}
	},

	isCallInProgress:function(o){
		if(o.conn) return o.conn.readyState != 4 && o.conn.readyState != 0;
		else return false;
	},

	releaseObject:function(o){
		o.conn = null;
		o = null;
	}
};

/********************verificar*********************/
selectLoader2 = function () {
	//private vars
	var thisObj = this;
	var xml = new xmlConnection();
	//public params
	this.showFirstOptionDefault = true;
	this.enableSelectOnLoad = true;
	this.labelOptionDefault = "Selecione...";
	this.valueCheckOnLoad = null;
	//methods
	this.onLoad = function(){};
	this.load = function(strObj, strList) {
		if (xml.create()) {
			xml.setURL(strList);
			xml.add('nocache', nocache());
			xml.onComplete = function() {
				this.setChildName('item');
				$(strObj).innerHTML = '';
				if (this.getCountItens()>1) {
					if (thisObj.showFirstOptionDefault){
						var linha = document.createElement("OPTION");
						$(strObj).appendChild(linha);
						linha.value = '';
						linha.text = thisObj.labelOptionDefault;
					}
					var index = 0;
					for (var j=0; j<this.getCountItens(); j++) {
						var linha = document.createElement("OPTION");
						$(strObj).appendChild(linha);
						linha.value = this.getAttByName('id', j);
						linha.text = this.getAttByName('nome', j);
						if (thisObj.valueCheckOnLoad!=null) {
							if (linha.value==thisObj.valueCheckOnLoad) {
								linha.selected = true;
								index = (j+1);
							}
						}
					}
					$(strObj).selectedIndex = index;
					$(strObj).disabled = !thisObj.enableSelectOnLoad;
				} else if (this.getCountItens() == 1) {
					var linha = document.createElement("OPTION");
					$(strObj).appendChild(linha);
					linha.value = this.getAttByName('id', 0);
					linha.text = this.getAttByName('nome', 0);
					linha.selected = true;
					$(strObj).disabled = true;
				} else {
					var linha = document.createElement("OPTION");
					$(strObj).appendChild(linha);
					linha.value = '';
					linha.text = 'Sem dados';
					linha.selected = true;
					$(strObj).disabled = true;
				}
			};
			xml.execute();
		};
	};
};