var xmlhttp = false;
var sp_id;
function createXMLHttpReq()
{
	if(window.ActiveXObject)
	{
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if(window.XMLHttpRequest)
	{
		xmlhttp = new XMLHttpRequest();
	}
}
function sendReq(url, param)
{
	xmlhttp.open("post", url, true);
	xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	xmlhttp.onreadystatechange=callback;
	xmlhttp.send(param);
}
function callback()
{
	var state = xmlhttp.readyState;
	if(state==4)
	{	
		var msg = xmlhttp.responseText.toString();
		var msgObj = eval('(' + msg + ')');
		if(msgObj.msg[0].fee && msgObj.msg[0].number)
		{
			var cartFee = document.getElementById("cartFee");
			var itemAmount = document.getElementById("itemAmount");
			cartFee.innerHTML = msgObj.msg[0].fee;
			itemAmount.innerHTML = msgObj.msg[0].number;
		}
		alert(msgObj.msg[0].msg);
	}
}
function ajax(url, param)
{
	createXMLHttpReq();
	param = param + "&tamp="+new Date().getTime();
	sendReq(url, param);
}