53. The system of claim 52, further comprising: means for selectively deactivating an input control, so that the input control is no longer displayed.
53. The system of claim 52, further comprising: means for selectively deactivating an input control, so that the input control is no longer displayed. 54. The system of claim 53, wherein said means for selectively deactivating an input control operates based on input entered at an input control other than the one being deactivated.