function makeXMLHttpRequestObject()
{	
	var XMLHttpRequestObject = false;

	if (window.XMLHttpRequest)
	{	XMLHttpRequestObject = new XMLHttpRequest();
	} else if (window.ActiveXObject)
	{	XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHttp");
	}
	
	return XMLHttpRequestObject;
}



function KontrolEt()
{		
	var KullaniciAdi = document.getElementById("field1").value;
		
	var doLoginObject = makeXMLHttpRequestObject();
	var obj = document.getElementById("Mesaj");

	if (doLoginObject)
	{
		doLoginObject.open("POST", "/Inc/UyeAdiKontrol.asp");
		doLoginObject.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		
		doLoginObject.onreadystatechange = function()
		{	if (doLoginObject.readyState != 4)
			{	obj.innerHTML = "";
				
			} else if (doLoginObject.readyState == 4 && doLoginObject.status == 200)
			{	var result = doLoginObject.responseText;
				
				if (result == 0)
				{	obj.innerHTML = "<div class=validation-advice>Bu kullanıcı adı kullanımda</div>";
				} else if (result == 1)
				{	obj.innerHTML = "<div class=UyeAdiOk>Bu kullanıcı adı müsait</div>";
				} else if (result == 2)
				{	obj.innerHTML = "<table border=0 cellpadding=0 style=border-collapse: collapse><tr><td height=1></td></tr></table>";
				} else
				{	alert(result);
				}
				
				delete doLoginObject;	//free XMLHttpRequest object from memory
				doLoginObject = null;
			}
		}
		
		doLoginObject.send("KullaniciAdi=" + KullaniciAdi);
	} else
	{	document.loginForm.submit();
	}
}