function mesforsearch(){
  var bf = true;
  var s = document.referrer;
  if(s == null || s == ''){
    return;
  }
  s = s.split('/');
  s = s[2];
  var ReqURL = '';
  if(s.match(/.*google.co.jp.*/i) ||
     s.match(/.*google.com.*/i)   ||
     s.match(/.*yahoo.co.jp.*/i)   ||
     s.match(/.*yahoo.com.*/i)    ||
     s.match(/.*technorati.jp.*/i) ){
   ReqURL = '/mesforsearch_s/docs/search.txt';
  }else{
   bf = false;
  }
  if(bf){
    document.getElementById('mesforsearch').style.display = 'block';
    var req = new Ajax.Request(ReqURL, { method: 'get',
      onComplete:function(httpObj){
      var rtext = httpObj.responseText;
      $('mesforsearch').innerHTML = rtext;
    }});
  }
}
mesforsearch();