function chgleft(selfframe,selfurl) {
  if(selfframe != "RIGHT")   return;
  hashed=selfurl.lastIndexOf("info-suginami");
  lefturl=selfurl.substring(0,hashed+14);

  if(selfurl.lastIndexOf("_e") >= 0)  lefturl+="left.html";
  else                                lefturl+="left_e.html";
  parent.LEFT.location.href=lefturl;
  }