function createRequestObject() {
	var ro;
	var browser = navigator.appName;
	if(browser == "Microsoft Internet Explorer"){
		ro = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		ro = new XMLHttpRequest();
	}
	return ro;
}

var http = createRequestObject();

function sndReq(action) {
	http.open('get', 'rpc.php?action='+action);
	http.onreadystatechange = handleResponse;
	http.send(null);
}

function handleResponse() {
	if(http.readyState == 4){
		document.getElementById('ajax_price').innerHTML = http.responseText;
	}
}