var timerlen = 5;
var slideAniLen = 250;

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 setsize(size)
{
  if(size < 500)
    $(".card").height(500);
  else
    $(".card").height(size);

}

jQuery(document).ready(function() 
{
  var height = $(".wrapper").height() - $(".header").height();
  var labels = ($(".cardlabel").height() + 8) * $(".cardlabel").size();
  var footer = $(".footer").height();
  setsize(height - labels - footer - 10);
});

$(window).resize(function()
{
  var height = $(".wrapper").height() - $(".header").height();
  var labels = ($(".cardlabel").height() + 8) * $(".cardlabel").size();
  var footer = $(".footer").height();
  setsize(height - labels - footer - 10);
}); 

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 sliding()
{
  var cards = $(".card");
  for(var i = 0; i < cards.length; i++)
  {
    if(moving[cards[i].id])
    {
      return true;
    }
  }
  return false;
}

function toggleSlide(c)
{
  if(sliding())
  {
    return;
  }

  var cards = $(".card");

  for(var i = 0; i < cards.size(); i++)
  {
    if(cards[i].id == c)
    {
      if(cards[i].style.display == "none")
      {
        slidedown(c);
      }
      else if(i != 0)
      {
        slideup(c);
        slidedown(cards[0].id);
      }
    }
    else
    {
      if(cards[i].style.display != "none")
      {
        slideup(cards[i].id);
      }
    }
  }
}