regexp:test() tests to see whether a string matches a specified regular expression.
regexp:test(testString, regExpString[, flagsString])
testStringThe string to test.
regExpStringThe JavaScript style regular expression to evaluate.
flagsString OptionalAn optional string containing character flags.
The character flags are:
gGlobal match. Has no effect for this function; it's allowed for consistency with other regexp functions.
iCase insensitive match<. If this flag is specified, the match is performed in a case insensitive fashion.
true if the specified regexp matches the test string.