var request = null;

function createRequest()
{
	try
	{
		request = new XMLHttpRequest();
	}
	catch(trymicrosoft)
	{
		try
		{
			request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(othermicrosoft)
		{
			try
			{
				request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(failed)
			{
				request = null;
			}
		}
	}

	if(request == null) alert("Ajax Request °´Ã¼ »ý¼ºÀ» ÇÒ ¼ö ¾ø½À´Ï´Ù.");
}

function idRequest(arg)
{
	createRequest();
	var url = "/member/idRequest.asp?login_id=" + escape(arg);
	request.open("GET", url, true);
	request.onreadystatechange = checkId;
	request.send(null);
}

function checkId()
{
	if(request.readyState == 4)
	{
		if(request.status == 200)
		{
			var isTherePreId = request.responseText;
			receiveCheckID(isTherePreId);
		}
	}
}