function CreateRequest(){
	
	var Request = false;
	if (window.XMLHttpRequest){
		Request = new XMLHttpRequest();
	}else if (window.ActiveXObject){
		try{
			Request = new ActiveXObject("Microsoft.XMLHTTP");
		}
		
		catch (CatchException){
			Request = new ActiveXObject("Msxml2.XMLHTTP");
		}
	}

	if (!Request){
		alert("Невозможно создать XMLHttpRequest");
	}
	
	return Request;
}

function SendRequest(r_method, r_path, r_args, r_handler){
	
	var Request = CreateRequest();
	if (!Request){
		return;
	}

	Request.onreadystatechange = function(){
		
		if (Request.readyState == 4){
			
			r_handler(Request);
		}else{
			//document.all.main.style.display='none';
			//document.getElementById('loader').innerHTML = "";

		}

	}
	
	if (r_method.toLowerCase() == "get" && r_args.length > 0)
		r_path += "?" + r_args;
	
	Request.open(r_method, r_path, true);
	
	if (r_method.toLowerCase() == "post"){
		
		Request.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=utf-8");
		Request.send(r_args);
	}else{
		Request.send(null);
	}
}

function calc_exchange(type,val1, val2){

	var _in = document.getElementById("in_"+type+val1+val2).value;
	var container = "out_"+type+val1+val2;
	pram = "goto=2&from="+val1+"&to="+val2+"&sum="+_in+"&type="+type;
	filename = "http://volgomoney.ru/calculation.php"
	document.getElementById(container).value = "";

	var Handler = function(Request){
		document.getElementById(container).value = Request.responseText;
	}

	SendRequest("POST",filename, pram, Handler);
}