This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
Specifies an event listener to receive
frequencychange events. Those events occur whenever the radio frequency is changed
navigator.mozFMRadio.onfrequencychange = funcRef
funcRef is a function to be called when the
frequencychange event occurs.
Not part of any specification.