var listen = document.evaluate( '/html/body/table/tbody/tr/td[1]' ,document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null ).singleNodeValue;

function showTheThing(s) {
  var el=document.getElementById('scplaying');
  if(!el) {
    el=document.createElement('table');
    el=listen.appendChild(el);
    el.id='scplaying';
    el.className='off';
    el.addEventListener('click', function() { 
      var el=document.getElementById('scplaying');
      el.className = el.className == 'off' ? 'on': 'off';
    }, false);
  }
  el.innerHTML = s;
}

function doTheThing() {
  var now=new Date();
  var milli=now.getTime();
  var then=parseInt(GM_getValue('milli', '0'))+50000;
  if(milli > then) {
    GM_xmlhttpRequest({
      method: 'GET',
      url: 'http://mycoffeelounge.net:8000/played.html',
      headers: {
        'User-agent': 'Mozilla/5.0 (compatible) Greasemonkey',
      },
      onload: function(resp) {
        var data=resp.responseText;
        data=data.replace(/.*<\/table><br><table.*?>(.*?)<\/table>.*/mi, '$1');
        showTheThing(data);
        var now=new Date;
        var milli=now.getTime();
        GM_setValue('milli', ''+milli);
        GM_setValue('data', data);
      }
    });
  } else {
    showTheThing(GM_getValue('data', ''));
  }
}

window.setInterval(doTheThing, 60000);
GM_addStyle([
  '#scplaying tr:first-child { display:none; }',
  '#scplaying tr:first-child + tr > td + td + td { display:none; }',
  '#scplaying.off tr + tr + tr { display:none; }',
  '#scplaying.off td:first-child { display:none; }',
  '#scplaying { background:black; color:orange; position:absolute; cursor: pointer; font: 10px Verdana sansserif; }'].join('\n'));