var xml_response_updating = "Updating ...";

function createRequest()
{
	if (window.XMLHttpRequest)
	{
		httpRequest = new XMLHttpRequest();
		if (httpRequest.overrideMimeType)
		{
			httpRequest.overrideMimeType('text/xml');
		}
	}
	else if (window.ActiveXObject)
	{
		try
		{
			httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {}
		}
	}
	if (!httpRequest)
	{
		alert("Cannot create an XMLHTTP instance");
		return null;
	}
	return httpRequest;
}