function ahah(url, target, delay) {
  document.getElementById(target).innerHTML = '<div style="padding-left:150px; padding-top:100px;"><img src="../images/case/loading.gif"></div>';
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (req != undefined) {
    req.onreadystatechange = function() {ahahDone(url, target, delay);};
    req.open("GET", url, true);
    req.send("");
  }
}  

function ahahDone(url, target, delay) {
  if (req.readyState == 4) { // only if req is "loaded"
    if (req.status == 200) { // only if "OK"
      document.getElementById(target).innerHTML = req.responseText;
      
      var menu = new menuManager('screenshots'); //appel de la fonction menuManager dans le fichier case.js
      
      hb = document.getElementById('caseBox').offsetHeight;
      document.getElementById('loadTarget').style.height = hb + "px";
      
      
      
    } else {
      document.getElementById(target).innerHTML="ahah error:\n"+req.statusText;
    }
    if (delay != undefined) {
       setTimeout("ahah(url,target,delay)", delay); // resubmit after delay
	    //server should ALSO delay before responding
    }
  }
}