var xmlHttp = createXmlHttpRequestObject();

//var serverAddress = 'ajax/member_validate.php';
var showErrors = true;

var cache = new Array();


function createXmlHttpRequestObject()
{
    var xmlHttp;
	
	try
	{
		xmlHttp=new XMLHttpRequest();
	}
	catch(e)
	{
		var XmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0",
										"MSXML2.XMLHTTP.5.0",
										"MSXML2.XMLHTTP.4.0",
										"MSXML2.XMLHTTP.3.0",
										"MSXML2.XMLHTTP",
										"Microsoft.XMLHTTP");
		for(var i=0;i<XmlHttpVersions.length&&!xmlHttp;i++)
		{
			try
			{
				xmlHttp = new ActiveXObject(XmlHttpVersions[i]);
			}
			catch(e) {}
		}
	}
	if(!xmlHttp)
	    displayError("Error creating the XMLHttpRequest Object.");
	else
	    return xmlHttp;
}

function displayError($message)
{
	if(showErrors)
	{
		showErrors = false;
		alert("Error encountered: \n" + $message);
		setTimeout("validate();",10000);
	}
}

function validate(inputValue, fieldID)
{
	if(xmlHttp)
	{
		if(fieldID)
		{
			inputValue = encodeURIComponent(inputValue);
			fieldID = encodeURIComponent(fieldID);
			cache.push("inputValue="+inputValue+"&fieldID="+fieldID);
			
		}
		
		try
		{
			if((xmlHttp.readyState == 4 || xmlHttp.readyState == 0) && cache.length >0 )
			{
				var cacheEntry = cache.shift();
				xmlHttp.open("POST", serverAddress, true);
				xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
				xmlHttp.onreadystatechange = handleRequestStateChange;
				xmlHttp.send(cacheEntry);
			}
		}
		catch(e)
		{
			displayError(e.toString());
		}
	}
}

function handleRequestStateChange()
{
	if(xmlHttp.readyState == 4)
	{
		if(xmlHttp.status == 200)
		{
			try
			{
				readResponse();
			}
			catch(e)
			{
				displayError(e.toString());
			}
		}
		else
		{
			displayError(xmlHttp.StatusText);
		}
	}
}

function readResponse()
{
	var response = xmlHttp.responseText;
	
	if(response.indexOf("ERRNO") >= 0 || response.indexOf("error:") >=0 || response.length == 0)
		 throw(response.length == 0 ?"Server error." : response);
		
		
		
	responseXml = xmlHttp.responseXML;
	
	xmlDoc = responseXml.documentElement;
	result = xmlDoc.getElementsByTagName("result")[0].firstChild.data;
	fieldID = xmlDoc.getElementsByTagName("fieldid")[0].firstChild.data;

	message = document.getElementById(fieldID + "Failed");
	message.className = (result == "0")? "error errorMsg" : "hidden errorMsg";
	
	setTimeout("validate();", 500)
};

function setFocus()
{
	document.getElementById("m_account").focus();
}