function creaAjax(){
  var objetoAjax=false;
  try {
   /*Para navegadores distintos a internet explorer*/
   objetoAjax = new ActiveXObject("Msxml2.XMLHTTP");
  } catch (e) {
   try {
     /*Para explorer*/
     objetoAjax = new ActiveXObject("Microsoft.XMLHTTP");
     }
     catch (E) {
     objetoAjax = false;
   }
  }

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

function enviar(){

	o = "notification";
	var ajax=creaAjax();
	var capaContenedora = document.getElementById(o);
	var nom = document.getElementById("nom").value;
	var telefon = document.getElementById("telefon").value;
	var mail = document.getElementById("email").value;
	var comentari = document.getElementById("comentari").value;
	var tmptxt = document.getElementById("tmptxt").value;
	ajax.open ('POST', "http://www.pujadatec.com/mail2.php", true);

    ajax.onreadystatechange = function() {
         if(ajax.readyState==4)
		 {
            if(ajax.status==200)
            {
                 document.getElementById(o).innerHTML=ajax.responseText;
            }
		 }
	}

	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send("nom=" + nom + "&mail=" + mail + "&comentari=" + comentari + "&telefon=" + telefon + "&tmptxt=" + tmptxt);
	return
}