function checkCurrencyFormat(format) {
		var defaults = lib.settings.currency.format;

		// Allow function as format parameter (should return string or object):
		if ( typeof format === "function" ) format = format();

		// Format can be a string, in which case `value` ("%v") must be present:
		if ( isString( format ) && format.match("%v") ) {

			// Create and return positive, negative and zero formats:
			return {
				pos : format,
				neg : format.replace("-", "").replace("%v", "-%v"),
				zero : format
			};

		// If no format, or object is missing valid positive value, use defaults:
		} else if ( !format || !format.pos || !format.pos.match("%v") ) {

			// If defaults is a string, casts it to an object for faster checking next time:
			return ( !isString( defaults ) ) ? defaults : lib.settings.currency.format = {
				pos : defaults,
				neg : defaults.replace("%v", "-%v"),
				zero : defaults
			};

		}
		// Otherwise, assume format was fine:
		return format;
	}
Parses a format string or object and returns format obj for use in rendering

`format` is either a string with the default (positive) format, or object
containing `pos` (required), `neg` and `zero` values (or a function returning
either a string or object)

Either string or format.pos must contain "%v" (value) to be valid