Return true if param value is a valid BRA Individual Registration (CPF).

isValidBRAIR.js

function isValidBRAIR(value) {

	value = String(value).replace(/[^\d]/g, '');

	if (value.length === 11 && !/^(\d)\1+$/.test(value)) {

		for (var from = 10, to = 2, sum = 0, index = -1; from > (to - 1); from--)

			sum += value[++index] * from;

		if (((sum * 10) % 11) == value[9]) {

			for (var from = 11, to = 2, sum = 0, index = -1; from > (to - 1); from--)

				sum += value[++index] * from;

			return ((sum * 10) % 11) == value[10];

		} else return false;

	} else return false;

}