function disabled_city(){
    document.service.idcity.disabled=true;
  }
  
  function get_city( idregion ){
    if ( idregion ){

      document.getElementById('load_city').innerHTML = "<img src='../../img/l1.gif' border='0'>";
      document.service.idcity.disabled=true;

      var req = new JsHttpRequest();
      req.onreadystatechange = function() {
        if (req.readyState == 4) {
          document.getElementById('load_city').innerHTML = '';
          document.getElementById('city').innerHTML = req.responseJS.idcity;
        }
      }
      req.open('POST', 'include/service/service_ajax.php', true);
      req.send( { idregion: idregion } );

    }
  }
  
  function get_field( value ){
    if ( value=='*' ){get_city( '*' );}
  }