function DistrictChange() {
  if (document.getElementById('district').value != 0) {
	loadMassivs(document.getElementById('district').value);
//    document.getElementById('massiv').focus();
  }
  else {
    document.getElementById('massiv').disabled = true;
  }
}



function loadMassivs(district_id) {
  var force = true;
  document.getElementById('massiv_div').innerHTML = '<select id="massiv" name="m" disabled><option>Загрузка...</option></select>';


  var req = new Subsys_JsHttpRequest_Js();
  req.onreadystatechange = function() {

      if (req.readyState == 4) {
          if (req.responseJS) {
              // Записываем в <div> результат работы.
			  document.getElementById('massiv_div').innerHTML = '<select id="massiv" name="m"><option value="0">все массивы</option>'+(req.responseJS.lst_massivs||'')+'</select>';
			  document.getElementById('massiv').focus();
          }
          
          //scroll(0,0);

          // Отладочная информация.
         //document.getElementById('debug').innerHTML = req.responseText;
      }
  }
  req.caching = false;
  req.open('GET', '/districts/load_massivs/', true);
  req.send({ district_id:district_id });
}