if( typeof( XMLHttpRequest ) == 'undefined' )
var XMLHttpRequest = function()
{
var request = null;
try
{
request = new ActiveXObject('Msxml2.XMLHTTP');
}
catch(e)
{
try
{
	request = new ActiveXObject('Microsoft.XMLHTTP');
}
catch(ee)
{}
}
return request;
}

function NeoAjaxRequest( url, callback )
{
var request = new XMLHttpRequest();
var async = typeof(callback) == 'function';

if( async ) 
{
request.onreadystatechange = function()
{
	if( request.readyState == 4 )
		callback( request.responseText );
}
}

var fileUrl = location.href;
fileUrl = fileUrl.substr( 0, fileUrl.lastIndexOf( '/' ) );
url = fileUrl + '/' + url;

request.open( 'POST', url, async );
request.send( 'dummy' );

if( !async )
return request.responseText;
}

function UploadProgressTrackerWrapper()
{
	this.SetUploadId = function( uploadId, callback )
	{
		return NeoAjaxRequest( 'neoAjax/SetUploadId.axd?UploadId=' + uploadId, callback );
	}
	this.GetUploadStatus = function( uploadId, sizeUnit, callback )
	{
		return NeoAjaxRequest( 'neoAjax/GetUploadStatus.axd?UploadId=' + uploadId + '&SizeUnit=' + sizeUnit, callback );
	}
}