var DDSPEED = 10;
var DDTIMER = 8;

// main function to handle the mouse events //
function ddMenu(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  	
	DDSPEED = 8
	clearInterval(c.timer);
  if(d == 1){
    clearTimeout(h.timer);
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.display = 'block';
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
      c.style.height = '0px';
    }
    c.timer = setInterval(function(){ddSlide(c,h,1)},DDTIMER);
  }else if(d == 0){
    
	h.timer = setTimeout(function(){ddCollapse(c,h)},50);
  }else if(d==-10){
	DDSPEED = 1
	
	h.timer = setTimeout(function(){ddCollapse(c,h)},50);
	}
	
}
function addText(id,cont){
	var h = document.getElementById(id + '-ddheader');
		h.innerHTML = cont.innerHTML
		ddMenu(id,-10)
}

// collapse the menu //
function ddCollapse(c,h){
  c.timer = setInterval(function(){ddSlide(c,h,-1)},DDTIMER);
}


// cancel the collapse if a user rolls over the dropdown //
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,h,1)},DDTIMER);
  }
	
}

// incrementally expand/contract the dropdown and change the opacity //
function ddSlide(c,h,d){
  var currh = c.offsetHeight;
  var dist;
  if(d == 1){
	h.style.opacity = 0
	h.style.color = "#ffffff"
    dist = (Math.round((c.maxh - currh) / DDSPEED));
  }else{
    dist = (Math.round(currh / DDSPEED));
	h.style.opacity = 1
	h.style.color = "#000000"
  }
  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 < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    
	clearInterval(c.timer);
	
  }
}