function HttpRequest(sUrl, fpCallback)
{
	this.request = this.createXmlHttpRequest();
	this.request.open("GET", sUrl, true);
	
	var tempRequest = this.request;
	function request_readystatechange()
	{
		if(tempRequest.readyState == 4)
		{
			if (tempRequest.status == 200)
			{
				fpCallback(tempRequest.responseText);
			}
			else
			{
				alert("ÓдíÎó²úÉú");
			}
		}
	}
	this.request.onreadystatechange=request_readystatechange;
}

HttpRequest.prototype.createXmlHttpRequest = function()
{
	if (window.XMLHtpRequest)
	{
		var oHttp = new XMLHttpRequest();
		return oHttp;
	}
	else if (window.ActiveXObject)
	{
		var versions = 
		[
		   "MSXML2.XmlHttp.6.0",
			 "MSXML2.XmlHttp.3.0"
		];
		for (var i=0; i<versions.length; i++)
		{
			try
			{
				var oHttp = new ActiveXObject(versions[i]);
				return oHttp;
			}
			catch (error)
			{
				//nothing
			}
		}
	}
	return null;
}

HttpRequest.prototype.send = function()
{
	this.request.send(null);
}