JavaScript sort() method by default sorts the array elements as strings in alphabetical and ascending order. [19, 32, 34, 4, 6]; The "4" is bigger than "19" because "4" is bigger than "1". You can fix this by providing the 'compareFix' parameters. For example:

n.sort( function(a,b) {return a-b} )

the result of following will be: [4, 6, 19, 32, 34]