Page scarping with phantomjs: `phantomjs track.js XXXXXXXX output.txt` XXXXXXXX is a TNT tracking code

track.js

var page = require('webpage').create(),
    args = require('system').args;

if (args.length === 1) {
  console.log('Missing track ID, "phantomjs track.js XXXXXXXX"');
  phantom.exit();
}
else {
  args.forEach(function(arg, i) {
      console.log('args > ' + i + ': ' + arg);
  });
}

page.open('http://www.tnt.com/webtracker/tracking.do?cons='+args[1], function(status) {

  console.log('status: ' + status);

  // find the data in the response
  var table = page.evaluate(function(s) {
    return document.getElementsByClassName(s)[1].innerText;
  }, 'appTable');

  // show the result
  console.log(table);

  // if a file is specified in execute params
  // write the output to the file
  if (args[2]) {
    var fs = require('fs');
    try {
      fs.write(args[2], table, 'w');
    } catch(e) {
      console.log(e);
    }    
  }

  phantom.exit();
});