function ajax_lsusers() {

  if (window.XMLHttpRequest) { // Mozilla, Safari, ...
    var xhr = new XMLHttpRequest();
    if(xhr.overrideMimeType) {
      xhr.overrideMimeType('text/html');
    }
  } else if (window.ActiveXObject) { // IE
      try {
        var xhr = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
          var xhr = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e1) {
          var xhr = null;
        }
      }
  } else {
    alert('Non supporté!!');
  }
  
  //Analyse du résultat
  xhr.onreadystatechange = function() {
    if(xhr.readyState == 4) {
      var rep = xhr.responseText;
      var obj = document.getElementById('listeu');
      obj.innerHTML = rep;
      obj.scrollTop = obj.scrollHeight;
    }
  }

  xhr.open('GET','/ajax_chat.php?info=users-pseudo');
  xhr.send(null);
}

function ajax_lastlog() {

  if (window.XMLHttpRequest) { // Mozilla, Safari, ...
    var xhr = new XMLHttpRequest();
    if(xhr.overrideMimeType) {
      xhr.overrideMimeType('text/html');
    }
  } else if (window.ActiveXObject) { // IE
      try {
        var xhr = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
          var xhr = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e1) {
          var xhr = null;
        }
      }
  } else {
    alert('Non supporté!!');
  }
  
  //Analyse du résultat
  xhr.onreadystatechange = function() {
    if(xhr.readyState == 4) {
      var rep = xhr.responseText;
      var obj = document.getElementById('listel');
      obj.innerHTML = rep;
      obj.scrollTop = obj.scrollHeight;
    }
  }

  xhr.open('GET','/ajax_chat.php?info=lastlog');
  xhr.send(null);
}

function ajax_nb() {

  if (window.XMLHttpRequest) { // Mozilla, Safari, ...
    var xhr = new XMLHttpRequest();
    if(xhr.overrideMimeType) {
      xhr.overrideMimeType('text/html');
    }
  } else if (window.ActiveXObject) { // IE
      try {
        var xhr = new ActiveXObject("Msxml2.XMLHTTP");
      } catch (e) {
        try {
          var xhr = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (e1) {
          var xhr = null;
        }
      }
  } else {
    alert('Non supporté!!');
  }
  
  //Analyse du résultat
  xhr.onreadystatechange = function() {
    if(xhr.readyState == 4) {
      var rep = xhr.responseText;
      var obj = document.getElementById('nb');
      obj.innerHTML = rep;
    }
  }

  xhr.open('GET','/ajax_chat.php?info=nb');
  xhr.send(null);
}