nl_tokens: A recursive function that finds all the parents of a given class .
pl_tokens: function findAllParents ( p ) { var lastParent = p [ 0 ] ; var lastParentsParent = <mask> [ lastParent ] ; if ( lastParentsParent === undefined ) { return p ; } else { p . unshift ( lastParentsParent ) ; return findAllParents ( p ) ; } }