function show_popup(url, args) {
  document.getElementById('popup_container').style.display = 'block';
  document.getElementById('popup_loading').style.display = 'block';
  document.getElementById('popup_content').style.display = 'none';
  
  
  var str = '';
  for (var key in args) {
    str = glue(str, key + '=' + args[ key ], '&');
  }
  queue.add('/ajax/' + url, str, 'ajax_show_popup');
}

function hide_popup() {
   document.getElementById('popup_container').style.display = 'none';
}

function ajax_show_popup( result ) {
  var ret = unescape(result);
  document.getElementById('popup_loading').style.display = 'none';
  document.getElementById('popup_content').style.display = 'block';
  document.getElementById('popup_content').innerHTML = ret;
  document.getElementById('popup_controls').onclick = function() { hide_popup(); }
  
}