/*
version: 0.8
autor: Marc Palau
url: http://www.javascript.es | http://www.nbsp.es
contacto: guru (arroba) javascript (punto) es

HELP ABOUT USE: http://livedocs.macromedia.com/flash/mx2004/main_7_2/00001408.html#wp3994770
AYUDA DE USO: http://www.cristalab.com/tutoriales/6/tutorial-de-LoadVars-en-flash-mx-2004

Wrapper implementado completamente

Obj
*# LoadVars class

Methods
*# LoadVars.addRequestHeader()
*# LoadVars.decode()
*# LoadVars.getBytesLoaded() //not applied
*# LoadVars.getBytesTotal() //not applied
*# LoadVars.load()
*# LoadVars.send()
*# LoadVars.sendAndLoad()
*# LoadVars.toString() 

Attributes
*# LoadVars.contentType *
*# LoadVars.loaded *

Events
*# LoadVars.onData
*# LoadVars.onLoad

*/
LoadVars=function(){
	this.loaded=false;
	this.sandlobj=false;
	this.onData=function(){};
	this.onLoad=function(){};
	this.headers=new Object();
	this.addRequestHeader("content-type","application/x-www-form-urlencoded");
	cConex=this.cconex();
}
//Private methods
LoadVars.prototype.cconex=function(){
	var conex = "";
	if(window.XMLHttpRequest){conex=new XMLHttpRequest();}
	else if(window.ActiveXObject){
		try{conex = new ActiveXObject("Msxml2.XMLHTTP");}
		catch(e){try{conex = new ActiveXObject("Microsoft.XMLHTTP");}
		catch(e){conex=false;}
		}
	}
	return conex;	
}
LoadVars.prototype.parseVars=function(){
	this.decode(this.valor);
	this.loaded=true;
	if(oConex.sandlobj){
		try{
			oConex.sandlobj.onLoad(true);
			oConex.sandlobj.onData(oConex.valor);
		}catch(e){
			alert("ERROR: "+e);
		}
	}else{
		oConex.onLoad(true);
		oConex.onData(oConex.valor);	
	}
}
LoadVars.prototype.processOnLoad=function(){
	if(cConex.readyState == 4){
		if(cConex.status==200){
			oConex.valor=cConex.responseText
			oConex.parseVars();
		}else if(cConex.status==404){
			alert("[processOnLoad.1] No se ha encontrado el archivo requerido: "+oConex.ruta);
			if(oConex.sandlobj){
				try{
					oConex.sandlobj.onLoad(false);
					oConex.sandlobj.onData(false);
				}catch(e){
					alert("[processOnLoad.2] El objeto: "+oConex.sandlobj.toString()+" no es un objeto loadVars valido");
				}
			}else{
				oConex.onLoad(false);
				oConex.onData(false);
			}
		}
	}
}
LoadVars.prototype.setHeaders=function(){
	for(var x in this.headers){
		var vari = x;
		var valu = this.headers[x];
		cConex.setRequestHeader(vari,valu);
	}
}
LoadVars.prototype.addVars=function(obj){
	for(var i in obj){
		this[i]=obj[i];
	}
}
LoadVars.prototype.getVariables=function(bool){
	var excepcions = new Array("","contentType","loaded","onData","onLoad","headers","cconex","parseVars","processOnLoad","setHeaders","getVariables","addRequestHeader","decode","load","send","sendAndLoad","toString","ruta","variables","valor","rutaArg","creaForm","addVars","loadPost","sandlobj","getBytesLoaded","getBytesTotal");
	var retorn = "";
	if(bool){
		var o = new Object();
	}
	for(var i in this){
		var isin=false;
		for(var j in excepcions){
			if(i == excepcions[j]){isin=true;}
		}
		if(!isin){
			if(bool){o[i]=this[i];
			}else{retorn += (i + "=" + this[i] + "&");}
		}
	}
	if(bool){
		return o;
	}else{
		return retorn.substring(0,retorn.length-1);
	}
}
LoadVars.prototype.creaForm=function(action,objVars,method){
	var form=document.createElement("form");
	form.action=action;
	form.method=method;
	form.style.display="none";
	for(var i in objVars){
		var inp=document.createElement("input");
		inp.type="hidden";
		inp.name=i;
		inp.value=objVars[i];
		form.appendChild(inp);
	}
	return form;
}
LoadVars.prototype.loadPost=function(ruta){
	oConex=this;
	this.ruta=ruta;
	if(cConex){
		cConex.onreadystatechange=this.processOnLoad;
		cConex.open("POST",this.ruta);
		this.setHeaders();
		var varPost=this.getVariables();
		cConex.send(varPost);
	}
}
//Public methods
LoadVars.prototype.addRequestHeader=function(variable,value){
	if(arguments.length==2){
		this.headers[variable]=value;
	}else if(arguments.length==1){
		for(var x=0;x<variable.length;x+=2){
			var vari = variable[x];
			var valu = variable[x+1];
			this.headers[vari]=valu;
		}
	}
}
LoadVars.prototype.decode=function(valor){
	this.variables = valor.split("&");
	for(var i=0;i<this.variables.length;i++){
		var _k=this.variables[i].split("=");
		this[_k[0]]=_k[1];
	}
}
LoadVars.prototype.load=function(ruta){
	oConex=this;
	this.ruta=ruta;
	this.rutaArg=ruta+"?"+this.getVariables();
	if(cConex){
		cConex.onreadystatechange=this.processOnLoad;
		cConex.open("GET",this.rutaArg);
		this.setHeaders();
		cConex.send(null);
	}
}
LoadVars.prototype.send=function(ruta,target,method){
	method=method.toUpperCase();
	if(method!="GET")method="POST";
	var vars = this.getVariables(true)
	var formulari=this.creaForm(ruta,vars,method);
	formulari.target=target;
	document.body.appendChild(formulari);
	formulari.submit();
	formulari.parentNode.removeChild(formulari);
}
LoadVars.prototype.sendAndLoad=function(ruta,obj,method){
	method=method.toUpperCase();
	if(method!="GET")method="POST";
	if(method=="GET"){
		this.addVars(obj);
		this.load(ruta);
	}else{
		this.addVars(obj);
		this.loadPost(ruta);
	}
	this.sandlobj=obj;
}
LoadVars.prototype.toString=function(){
	return this.getVariables();
}
LoadVars.prototype.getBytesLoaded=function(){
	if(cConex.readyState > 2){
		return cConex.responseText.length;
	}else{
		return 0;
	}
}
LoadVars.prototype.getBytesTotal=function(){
	var v=cConex.getResponseHeader("Content-Length");
	if(!v){v=0;}
	return v;
}