Parse query string in Javascript

gistfile1.coffee

# Raw Javascript functions
window.parseQueryString = ->
  query = (window.location.search || '?').substr(1)
  map   = {}
  query.replace(/([^&=]+)=?([^&]*)(?:&+|$)/g, (match, key, value) ->
      (map[key] = map[key] || []).push(value)
  )
  return map