function getHttpRequest()
{
	var httpRequest;
	if (window.XMLHttpRequest)
	{
		httpRequest = new XMLHttpRequest();
	}
	else if (window.ActiveXObject)
	{
		try
		{
			httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e)
			{}
		}
	}

	if (httpRequest)
	{
		return httpRequest;
	}

	alert('Your browser does not support AJAX.');
	return false;
}