function submitForm()
{ 
    var xhr; 
    try {  xhr = new ActiveXObject('Msxml2.XMLHTTP');   }
    catch (e) 
    {
        try {   xhr = new ActiveXObject('Microsoft.XMLHTTP');    }
        catch (e2) 
        {
          try {  xhr = new XMLHttpRequest();     }
          catch (e3) {  xhr = false;   }
        }
     }
 
    xhr.onreadystatechange  = function()
    { 
         if(xhr.readyState  == 4)
         {
              if(xhr.status  == 200) 
                 document.getElementById("actu").innerHTML = xhr.responseText;	   
              else 
                 document.ajax.dyn="Error code " + xhr.status;
         }
    }; 

   xhr.open( "GET", "reload_actu.php",  true); 
   xhr.send(null); 
}