var myWin;
  
function close_window()  {
  if (myWin != null && !myWin.closed) {
    myWin.close();
  }
  return true;
}

function open_window() {
  if  (myWin == null || myWin.closed) {
    myWin = window.open ("", "mywin", "width=750,height=600,toolbar=1,scrollbars=1")
  }
}


function send_email(start, subj) {
  var dest;
  dest = "mail" + "to:" + start + "@" + "your-friend-in-insurance.com";
  if (subj) {
    dest += "?subject=" + subj;
  }
  document.location.href = dest;
}