Allows loading of external JavaScript files for use in on{X}

loadUnderscore.js

(function() {
    device.ajax(
    {
      url: 'http://underscorejs.org/underscore-min.js',
      type: 'GET',
      headers: {
        'Content-Type': 'text/javascript'
      }
    },
    function onSuccess(body, textStatus, response) {
      eval(body);  
      if (_) console.log('underscore.js loaded successfully');
      yourCode(_);
    },
    function onError(textStatus, response){
      console.error('error code: ', response.status);
    });
})();

function yourCode(_) {
    var stooges = [{name : 'moe', age : 40}, {name : 'larry', age : 50}, {name : 'curly', age : 60}];
    console.info(_.pluck(stooges, 'name'));
}