function create_ajax_object()
{
	var parent_object = null;
	
	http_request = false;
	if (window.XMLHttpRequest) 
	{
		// Mozilla, Safari,...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType)
		{
			// set type accordingly to anticipated content type
			//http_request.overrideMimeType('text/xml');
			http_request.overrideMimeType('text/html');
		}
	}
	else if (window.ActiveXObject)
	{
		// IE
		try
		{
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {}
		}
	}
	if (!http_request)
	{
		//alert('Cannot create XMLHTTP instance');
		return false;
	}
	
	return http_request;
}