nl_tokens: generate a guid that is tested unique against id s on the current doc
pl_tokens: function domSafeRandomGuid ( ) { var _arguments = arguments ; var _again = true ; _function : while ( _again ) { numberOfBlocks = output = num = undefined ; var s4 = function s4 ( ) { return Math . floor ( ( 1 + Math . random ( ) ) * 65536 ) . toString ( 16 ) . substring ( 1 ) ; } ; _again = false ; var numberOfBlocks = _arguments [ 0 ] === undefined ? 4 : _arguments [ 0 ] ; var <mask> = '' ; var num = numberOfBlocks ; while ( num > 0 ) { output += s4 ( ) ; if ( num > 1 ) output += '-' ; num -- ; } if ( null === document . getElementById ( output ) ) { return output ; } else { _arguments = [ numberOfBlocks ] ; _again = true ; continue _function ; } } }