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);

  endHeight[objname] = parseInt(obj[objname].style.height);
  startTime[objname] = (new Date()).getTime();

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

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

  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 toggleComment(objname) {
  if (document.getElementById(objname).style.display != "none") {
    slideup(objname);
    document.getElementById(objname + '_link').innerHTML = "Open Quick Comment";
  }
  else {
    slidedown(objname);
    document.getElementById(objname + '_link').innerHTML = "Close Quick Comment";
  }
}