javascript:
(function(){
  if(!location.href.match(/^http:\/\/mixi.jp\/show_friend.pl/)[0]){
    return;
  }
  var id = location.href.match(/\d+/)[0];
  var user = document.body.innerHTML.match(/<h3>(.*)さん\(\d*\)<\/h3>/)[1];
  var d = new Date();
  var date = d.getFullYear() + '-' + (d.getMonth() + 101 + '').substring(1) + '-' + (d.getDate() + 100 + '').substring(1);
  var div = document.createElement('div');
  div.className = 'heading14';
  var a = document.createElement('a');
  a.href = "http://mixi.jp/delete_log.pl?id="+id+"&date="+date;
  a.style.fontSize="1.5em";
  a.style.fontWeight="bold";
  a.innerHTML="消しちゃう!";
  var dd = document.createElement('dd');
  dd.appendChild(a);
  var strong = document.createElement('strong');
  strong.innerHTML=user+"さんへの足跡を";
  var dt = document.createElement('dt');
  dt.class="shortline";
  dt.appendChild(strong);
  var dl = document.createElement('dl');
  dl.appendChild(dt);
  dl.appendChild(dd);
  div.appendChild(dl);
  var p = document.getElementById('bodyContents');
  p.insertBefore(div, p.firstChild);
}
)();