function doLoad(force) {
  var i = document.getElementById('pict0').value;
  if (force) i++; else i--;
            var qimg = '' + i;
  //var query = '' + document.getElementById('page_id').value;
  var reg = /(\d+).html(.*)$/;
  var res = reg.exec(document.URL);
  var query = '' + res[1];
  var req = new Subsys_JsHttpRequest_Js();
  req.onreadystatechange = function() {
    if (req.readyState == 4) {
      if (req.responseJS) {
        document.getElementById('img0').innerHTML = req.responseJS.img1||'';
        document.getElementById('img1').innerHTML = req.responseJS.img2||'';
        document.getElementById('img2').innerHTML = req.responseJS.img3||'';
        i = req.responseJS.i;
      }
    }
  }
  req.caching = true;
  req.open('POST', 'loadimage.php', true);
  req.send({ pg: query, img: qimg });
}