Formatting Non-date Arbitrary X-axis

var day_data = [

  {"elapsed": "I", "value": 34},

  {"elapsed": "II", "value": 24},

  {"elapsed": "III", "value": 3},

  {"elapsed": "IV", "value": 12},

  {"elapsed": "V", "value": 13},

  {"elapsed": "VI", "value": 22},

  {"elapsed": "VII", "value": 5},

  {"elapsed": "VIII", "value": 26},

  {"elapsed": "IX", "value": 12},

  {"elapsed": "X", "value": 19}

];

Morris.Line({

  element: 'graph',

  data: day_data,

  xkey: 'elapsed',

  ykeys: ['value'],

  labels: ['value'],

  parseTime: false

});