function dataProvider() {
};
dataProvider.prototype.iniciar = function() {
	try {
		// Mozilla / Safari
		this._xh = new XMLHttpRequest();
	} catch (e) {
		// Explorer
		var _ieModelos = new Array(
		'MSXML2.XMLHTTP.5.0',
		'MSXML2.XMLHTTP.4.0',
		'MSXML2.XMLHTTP.3.0',
		'MSXML2.XMLHTTP',
		'Microsoft.XMLHTTP'
		);
		var success = false;
		for (var i=0;i < _ieModelos.length && !success; i++) {
			try {
				this._xh = new ActiveXObject(_ieModelos[i]);
				success = true;
			} catch (e) {
				// Implementar manejo de excepciones
			}
		}
		if ( !success ) {
			// Implementar manejo de excepciones, mientras alerta.
			return false;
		}
		return true;
	}
}

dataProvider.prototype.ocupado = function() {
	estadoActual = this._xh.readyState;
	return (estadoActual && (estadoActual < 4));
}

dataProvider.prototype.procesa = function() {
	if (this._xh.readyState == 4 && this._xh.status == 200) {
		this.procesado = true;
	}
}

dataProvider.prototype.enviar = function(urlget,datos) {
	if (!this._xh) {
		this.iniciar();
	}
	if (!this.ocupado()) {
		this._xh.open("GET",urlget,false);
		this._xh.send(datos);
		if (this._xh.readyState == 4 && this._xh.status == 200) {
			return this._xh.responseText;
		}
		
	}
	return false;
}


function setCookie(c_name,value,expiredays)
{
var exdate=new Date();
exdate.setDate(exdate.getDate()+expiredays);
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toUTCString());
}

function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=");
  if (c_start!=-1)
    {
    c_start=c_start + c_name.length+1;
    c_end=document.cookie.indexOf(";",c_start);
    if (c_end==-1) c_end=document.cookie.length;
    return unescape(document.cookie.substring(c_start,c_end));
    }
  }
return "";
}


function rateItem(rating,itemID,ratedarea) {
	// only send the vote is this user has not voted already
	// set a cookie to voted for this itemID
	votedcookie = getCookie('answer'+itemID);
	if (votedcookie != 'voted') {
		setCookie('answer'+itemID,'voted',365);
		remotos = new dataProvider;
		nt = remotos.enviar('rate-'+ratedarea+'.asp?rating='+rating+'&ID='+itemID);
		rating = (rating * 25) - 8;
		document.getElementById('current-rating'+itemID).style.width = rating+'px';
		document.getElementById('ratingtext'+itemID).innerHTML = 'Thank you for your rating!';
	} else {
		document.getElementById('ratingtext'+itemID).innerHTML = 'One vote only please.';
	}
}