var DDSPEED = 1;
var DDTIMER = 15;
var OFFSET = -10;
var ZINT = 100;

function ddMenu(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  clearInterval(c.timer);
  if(d == 1){
	h.style.color = '#FF9900';
    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';
	  c.style.top = '-28px';
    }
    ZINT = ZINT + 1;
    c.style.zIndex = ZINT;
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else{
	h.style.color = '#329096';
    h.timer = setTimeout(function(){ddCollapse(c)},50);
  }
}

function ddCollapse(c){
	c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
	c.style.display = "none"
}

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

function ddSlide(c,d){
  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) + ')';
  c.style.background ="url(img/menu/back_sub_menu.gif)";
  if(currh > (c.maxh - 2) && d == 1){
    clearInterval(c.timer);
  }else if(dist < 1 && d != 1){
    clearInterval(c.timer);
    c.style.display = 'none';
  }
}