var DDSPEED = 6;
var DDTIMER = 6;
var OFFSET = 18;
var ZINT = 100;

function ddMenu(id,d){
  var h = document.getElementById(id);
  var c = document.getElementById(id + '-submenu');
  if((c != null)&&(h != null))
  {
  	  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){
  c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);
}

function cancelHide(id){
  var h = document.getElementById(id);
  var c = document.getElementById(id + '-submenu');
  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) + ')';
  if(currh > (c.maxh - 2) && d == 1){
    clearInterval(c.timer);
  }else if(dist < 1 && d != 1){
    clearInterval(c.timer);
    c.style.display = 'none';
  }
}