jenkins_.js

jQuery(function($){
  if(!/job/.test(location.href)){
    return;
  }

  var favicon = $('<link />').attr({
    rel: 'shortcut icon',
    type: 'image/gif'
  }).appendTo('head');
  var _src = null;
  setInterval(function(){
    var src = $('#buildHistory .build-row img:first').attr('src');
    if(_src != src || /anime/.test(src)){
      favicon.attr('href', src);
      _src = src;
    }
  }, 1000);
});