U.Helper

function xmlhttprequest()
{
if (window.XMLHttpRequest)  
  {
      try {
           request = new XMLHttpRequest();
          } catch (e){/* nothing */}
  } else if (window.ActiveXObject)  
         {
         try {
             request = new ActiveXObject('Msxml2.XMLHTTP');
             } catch (e)
      {
                try {
                     request = new ActiveXObject('Microsoft.XMLHTTP');
                    } catch (e){/* nothing */}
               }
         }
return request;
}

function uSidePost()
{
  var request = xmlhttprequest();
  var postSend = null;
  var title = document.getElementById('title').value;
  var message = document.getElementById('message').value;
  postSend = 'title=' + title + '&message=' + message;
  var url = 'modules/post.php';
  request.open('POST', url, true);
  request.setRequestHeader('Content-type', 'application/x-www-form-urlencoded; charset=utf-8');
  request.onreadystatechange = function()  
      {  
         if (request.readyState == 4)  
         {  
          if (request.status == 200)
       {
// Код, который выполняется при удачном постинге.
                     }
  }
      }
  request.send(postSend);
}