Answer to Question #11576 in AJAX | JavaScript | HTML | PHP for Anna

Question

Write a regular expression that matches only the following::

CDEF 88.3 QP or ABCD 55 AM or AEIO 100.2 FM or QWER 100 AM

In other words:
starts with four letters
followed by a space
followed by two or three digits,
followed by (optionally) a decimal and another digit
followed by a space
terminated with either AM or FM