nl_tokens: at least IE6 uses arguments . length for variadic signature
pl_tokens: function ( array , begin , end ) { // After tested for IE 6, the one below is of the best performance // see http://jsperf.com/slice-fix if ( typeof begin === 'undefined' ) { return slice . call ( array ) ; } if ( typeof end === 'undefined' ) { return slice . call ( <mask> , begin ) ; } return slice . call ( array , begin , end ) ; }