function launchGreystoneTool (page, width, height)
	{
		
		var window_name = "greystone_tool";
		
		var left = (screen.width - width) / 2;
		
		var top = (screen.height - height) / 2;
		
		var params = "width=" + width + ", height=" + height + ", left=" + left + ", top=" + top;
		
		window.open (page, window_name, params); return false;

	}