function evalHandler(response) {
    try {
        eval(response);
    } catch(e) {
        alert('Ein Fehler beim Updaten ist aufgetrenten: '+e.toString());
    }
}

function _postback(url, data, handler)
{
  var req = loadXMLHttpRequest();
  if(!req) return(false);

  var content = '';
  for(var i in data)
  {
    content += (content.length ? '&' : '') + i + '=' + encodeURIComponent(data[i]);
  }

  function callBack()
  {
    if(req.readyState == 4)
    {
      if(req.status == 200)
      {
        if(typeof handler == 'function')
        handler(req.responseText, req);
      }
      else
      {
        alert('An error has occurred: ' + req.statusText);
      }
    }
  }

  req.onreadystatechange = callBack;

  req.open('POST', url, true);
  req.setRequestHeader
  (
      'Content-Type',
      'application/x-www-form-urlencoded; charset=UTF-8'
  );
  //alert(content);
  req.send(content);
}


function loadXMLHttpRequest() {
    var pageRequest = false;
    /*@cc_on
    @if (@_jscript_version >= 5)
        try {
            pageRequest = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e) {
            try {
                pageRequest = new ActiveXObject("Microsoft.XMLHTTP");
            }
            catch (e) {
                pageRequest = false;
            }
        }
    @end
    @*/

    if (!pageRequest && typeof XMLHttpRequest != 'undefined') {
        pageRequest = new XMLHttpRequest()
    }
    return pageRequest;
}