blur does not work with dynamic fields

blur does not work with dynamic fields

has a street name search based on zip code, but it works only for the first line. the selector based on this class, but still added after the lines are not surveyed.


 http://jsfiddle.net/digaort/kDz7p/

example of a valid ZIP code:
01415005
01042000
01310200
01414000

know someone explain to me why?