function ajaxhtml(part,param) {
  var req;
  if (window.XMLHttpRequest)
    req=new XMLHttpRequest();
  else if (window.ActiveXObject) {
    try { req=new ActiveXObject('Msxml2.XMLHTTP'); } catch (e) {}
    try { req=new ActiveXObject('Microsoft.XMLHTTP'); } catch (e) {}
  }
  if (req) {
    req.onreadystatechange=function() {
      if (req.readyState==4&&req.status==200) {
        if (part=='today') {
          if (req.responseText!=''&&param!='') {
            daytoday=req.responseText.split('*',1); //daytoday глобален!
            daytoday=daytoday[0];
            document.getElementById('today').innerHTML=req.responseText.substr(daytoday.length+1);
          }
        } else if (part=='accanecdot'||part=='accaphorism'||part=='ifknow'||part=='menu') {
          if (req.responseText!='') document.getElementById(part).innerHTML=req.responseText;
        }
      }
    }
    req.open('POST', 'ajaxhtml.php',true);
    req.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
    var params;
    if (part=='today') {
      if (param!='') params='part=today&daymon='+param;
    } else if (part=='accanecdot'||part=='accaphorism'||part=='ifknow') {
      params='part='+part;
    } else if (part=='menu') {
      params='part=menu';
      if (param=='admin') params+='&who=admin';
    }
    req.send(params);
  }
}