code: public void setURLFrame(String id, String data)
  	{
  		if ((id.charAt(0) == 'W') && !id.equals(ID3v2Frames.USER_DEFINED_URL))
  		{
  			updateFrameData(id, data.getBytes());
  		}
  	}
docs: Set the data contained in a URL frame.  This includes all frames with
  an id that starts with 'W' but excludes "WXXX".  If an improper id is
  passed, then nothing will happen.
  
  @param id the id of the frame to set the data for
  @param data the data for the frame