var aoPicture = null;
var which = 0;

function displayPicture(id, picno){

  if (aoPicture == null) {
    aoPicture = GetXmlHttpObject();
  }

  if (aoPicture != null) {
    if (aoPicture.readyState == 4 || aoPicture.readyState == 0) {

      var objLoading = document.getElementById("divPicLoad");
      objLoading.style.display = "";
      which = picno;            

      var url = "event_update.php?update_type=DISPLAY_PICTURE&picture_id=" + id;
      aoPicture.open("POST",url,true);
      aoPicture.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
      aoPicture.send(null);
      aoPicture.onreadystatechange = displayPictureStateChanged;
    }
  }
}

function displayPictureStateChanged(){
  if (aoPicture != null){
    if (aoPicture.readyState==4){

      var objLoading = document.getElementById("divPicLoad");
      objLoading.style.display = "none";

      document.getElementById("imgOrg").innerHTML = aoPicture.responseText;
      document.getElementById("imgOrg").display = "";
    }
  }
}