var timerlen = 5;
var slideAniLen = 700;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

function slidedown(objname)
{
  if(moving[objname])
    return;

  if(document.getElementById(objname).style.display != "none")
    return; // cannot slide down something that is already visible

  moving[objname] = true;
  dir[objname] = "down";
  startslide(objname);
}

function slideup(objname)
{
  if(moving[objname])
    return;

  if(document.getElementById(objname).style.display == "none")
    return; // cannot slide up something that is already hidden

  moving[objname] = true;
  dir[objname] = "up";
  startslide(objname);
}

function startslide(objname)
{
  obj[objname] = document.getElementById(objname);

/*
  var height=0;
  alert(obj[objname].childNodes.length);
  for (var i=0; i<obj[objname].childNodes.length;i++)
  {
  alert(obj[objname].childNodes[i].id);
  alert(obj[objname].childNodes[i].scrollHeight);
    height+=parseInt(obj[objname].childNodes[i].style.height);
  }*/
  //endHeight[objname] = parseInt(obj[objname].style.height);
  //endHeight[objname] = height;
  startTime[objname] = (new Date()).getTime();

  if(dir[objname] == "down"){
    obj[objname].style.height = "1px";
  }

  obj[objname].style.display = "block";

endHeight[objname] = obj[objname].scrollHeight;

  timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}

function slidetick(objname)
{
  var elapsed = (new Date()).getTime() - startTime[objname];

  if (elapsed > slideAniLen)
    endSlide(objname)
  else
  {
    var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
    if(dir[objname] == "up")
      d = endHeight[objname] - d;

    obj[objname].style.height = d + "px";
  }

  return;
}

function endSlide(objname)
{
  clearInterval(timerID[objname]);

  if(dir[objname] == "up")
    obj[objname].style.display = "none";

  obj[objname].style.height = endHeight[objname] + "px";

  delete(moving[objname]);
  delete(timerID[objname]);
  delete(startTime[objname]);
  delete(endHeight[objname]);
  delete(obj[objname]);
  delete(dir[objname]);

  return;
}

function toggleSlide(objname)
{
  if (document.getElementById(objname).style.display != "none") {
    slideup(objname);
    document.getElementById(objname + '_link').innerHTML = "[Afficher]";
  }
  else {
    slidedown(objname);
    document.getElementById(objname + '_link').innerHTML = "[Masquer]";
  }
}

function resetSlideHeight(objname,objref)
{
    var target=xajax.$(objname);
    var ref=xajax.$(objref);
    //var targetheight=target.style.height;
    var refheight=(ref.scrollHeight>70)?ref.scrollHeight:70;
    //if (!target || !ref)
        //return;
    var diff=target.style.height-refheight;
    target.style.height=refheight+'px';
    scrollBy(0,diff);
    //document.body.scrollTop=document.body.scrollTop-diff+'px';
    //alert('target : '+target.id+' | targetheight : '+targetheight+' | ref : '+ref.id+' | '+refheight+' | final target height : '+target.style.height);
    //alert(target.style.visible);
}