var DDSPEED = 10;
var DDTIMER = 15;
var OFFSET = -2;
var ZINT = 100;

function ddMenu(id,d){
  var h = document.getElementById('ddheader-' + id);
  var c = document.getElementById('ddcontent-' + id);
  if(c)
  {
      clearInterval(c.timer);
      if(d == 1){
        clearTimeout(h.timer);
        c.style.display = 'block';
        if(c.maxh && c.maxh <= c.offsetHeight){return}
        else if(!c.maxh){
          c.style.left = (h.offsetWidth + OFFSET) + 'px';
          c.style.height = 'auto';
          c.maxh = c.offsetHeight;
          c.style.height = '0px';
        }
        ZINT = ZINT + 1;
        c.style.zIndex = ZINT;
        c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
      }else{
        h.timer = setTimeout(function(){ddCollapse(c)},50);
      }
  }
}

function ddCollapse(c){
  if(c)
  {
      c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
  }
}

function cancelHide(id){
  var h = document.getElementById('ddheader-' + id);
  var c = document.getElementById('ddcontent-' + id);
  if(c)
  {
      clearTimeout(h.timer);
      clearInterval(c.timer);
      if(c.offsetHeight < c.maxh){
        c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
      }
  }
}

function ddSlide(c,d){
  if(c)
  {
      var currh = c.offsetHeight;
      var dist;
      if(d == 1){
        dist = Math.round((c.maxh - currh) / DDSPEED);
      }else{
        dist = Math.round(currh / DDSPEED);
      }
      if(dist <= 1 && d == 1){
        dist = 1;
      }
      c.style.height = currh + (dist * d) + 'px';
      c.style.opacity = currh / c.maxh;
      c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')';
      if(currh > (c.maxh - 2) && d == 1){
        clearInterval(c.timer);
      }else if(dist < 1 && d != 1){
        clearInterval(c.timer);
        c.style.display = 'none';
      }
  }
}