function CreateHttpRequest(url, postString, handler, param)
{
	var http_request = false;
	if (window.XMLHttpRequest) 
	{ // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) 
		{
			http_request.overrideMimeType('text/xml');
			// See note below about this line
		}
	} 
	else if (window.ActiveXObject) 
	{ // IE
		try 
		{
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} 
		catch (e) 
		{
			try 
			{
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (e) 
			{}
		}
	}
	if (!http_request) 
	{
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	
	http_request.onreadystatechange = function() { handler(http_request, param) };
	http_request.open('POST', url, true);
	http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
//	http_request.setRequestHeader('Content-Type', 'multipart/form-data');	
//	http_request.setRequestHeader('Content-Type', 'text/html; charset=iso-8859-1');
//	http_request.setRequestHeader('Content-Type', 'text/plain');
	http_request.send(postString);
	return http_request;
}

/*
function ExchangeRateHandler(http_request)
{
	if (http_request.readyState == 4) 
	{
    	if (http_request.status == 200) 
		{
			var Result = http_request.responseText;
			var ResultArray = Result.split("&");
			var TablesetId = ResultArray[0].split("=")[1];
			var OrderNumber = ResultArray[1].split("=")[1];
			GetResult(TablesetId, OrderNumber);
        } 
		else 
		{
        }
    }
}
*/