jQuery.ping = function(url, params) {
  querystring = '';

  switch (true) {
    case (params instanceof Array):
      querystring = params.join('&');
      break;
    case ((params instanceof Object) && !(params instanceof String)):
      var temp_array = new Array();
      for (var k in params) {
        temp_array.push(k + '=' + params[k]);
      }
      querystring = temp_array.join('&');
      break;
    default: // It's a string.
      querystring = params;
  }
  var img = new Image();
  img.src = url + '?' + querystring;
}