(function() {
  var rolled_up_errors = [];
  var timer;
  window.onerror = function(message, script_url, line_number) {
      try {
          if (Scribd.rails_env == 'test') {
            if (message == 'setting a property that has only a getter' && script_url == '' && line_number == 0) // selenium generates this
              return;
            else
              alert('Javascript error!\nMessage: ' + message + '\nURL: ' + script_url + '\nLine: ' + line_number);
          } else {
            if (timer != undefined)
              clearTimeout(timer);

            var index = rolled_up_errors.length;
            var body_tag = document.getElementsByTagName('body')[0];      
            var body_class_names = '', controller = '', action = '', rev = '';

            if (body_tag) {
                body_class_names = body_tag.className.split(' ').sort();
                controller = body_class_names[0].substring(4); // get rid of loc_
                action = body_class_names[1].substring(body_class_names[0].length + 1); // remove prefix & underscore to get action
                rev = body_tag.getAttribute('data-revision');
            }

            rolled_up_errors.push(encodeURI('errors[' + index + '][page_url]=') + encodeURIComponent(window.location.href)
                                  + encodeURI('&errors[' + index + '][message]=') + encodeURIComponent(message)
                                  + encodeURI('&errors[' + index + '][script_url]=') + encodeURIComponent(script_url)
                                  + encodeURI('&errors[' + index + '][line_number]=') + encodeURIComponent(line_number)
                                  + encodeURI('&errors[' + index + '][controller]=') + encodeURIComponent(controller)
                                  + encodeURI('&errors[' + index + '][action]=') + encodeURIComponent(action)
                                  + encodeURI('&errors[' + index + '][rev]=') + encodeURIComponent(rev));

            timer = setTimeout(function() {
              try { new Ajax.Request('/javascript_errors', { parameters: rolled_up_errors.join('&') }); }
              catch (e) {}
              rolled_up_errors = [];
              timer = undefined;
            }, 1000);
          }
          
      } catch (e) { }
  }
})();