Eligius javascript api, backed by jsonp.

api.js

(function (window, document) {

  'use strict';

  var api = function (cmd, opts, cb) {

    opts.cmd = cmd;

    var id = 'APICB' + Math.round(Math.random() * 1e9),
      url = 'http://eligius.st/~wizkid057/newstats/api.php',
      head = document.querySelector('head'),
      script = document.createElement('script'),
      qs = Object.keys(opts).map(function (key) {
        return encodeURIComponent(key) + '=' + encodeURIComponent(opts[key]);
      }).join('&');

    window[id] = function (data) {
      delete window[id];
      head.removeChild(script);
      if (data.error) {
        cb(new Error(data.error));
      } else if (data.cmd !== opts.cmd) {
        cb(new Error('Server returned wrong command'));
      } else {
        cb(null, data.output);
      }
    };

    script.setAttribute('type', 'text/javascript');
    script.setAttribute('src', url + '?' + qs + '&format=jsonp&callback=' + id);

    script.addEventListener('error', function () {
      window[id]({ error: 'Network error' });
    });

    head.appendChild(script);

  };

  api.getacceptedcount = function (opts, cb) { api('getacceptedcount', opts, cb); };
  api.getuseroptions = function (opts, cb) { api('getuseroptions', opts, cb); };
  api.gethashrate = function (opts, cb) { api('gethashrate', opts, cb); };
  api.getuserstat = function (opts, cb) { api('getuserstat', opts, cb); };

  window.Eligius = api;

}(this, this.document));

usage.js

var u = prompt('What is you username?');

Eligius.gethashrate({ username: u }, function (err, data) {
  if (err) {
    alert('Something went wrong!\n\n(' + err.message + ')');
  } else {
    alert('Your average hashing rate is: ' + data.av256.pretty);
  }
});