public static String findNewerWindowHandle(WebDriver driver, Set<String> baselineHandles, int timeout)
	{
		String foundHandle = "";
		long t = System.currentTimeMillis();
		long endTime = t + timeout * 1000;
		while ( foundHandle.isEmpty() && System.currentTimeMillis() < endTime )
		{
			Set<String> currentHandles = driver.getWindowHandles();
			if (currentHandles.size() != baselineHandles.size() )
			{
				for ( String currentHandle : currentHandles )
				{
					if ( !baselineHandles.contains( currentHandle ) )
					{
						foundHandle = currentHandle;
						break;
					}
				}
			}
			if ( foundHandle.isEmpty() )
			{
				try {
					Thread.sleep(250);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		}
		// Note: could optionally check for handle found here and throw
		// an exception if no window was found.
		return foundHandle;
	}