if (!window.ms) var ms = {};
if (!ms.menu) ms.menu = {
    DDSPEED: 10,
    DDTIMER: 15
}
// main function to handle the mouse events //
ms.menu.ddMenu = function(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  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(){ms.menu.ddSlide(c,1)},ms.menu.DDTIMER);
  }else{
    h.timer = setTimeout(function(){ms.menu.ddCollapse(c)},50);
  }
}

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

// cancel the collapse if a user rolls over the dropdown //
ms.menu.cancelHide = function (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(){ms.menu.ddSlide(c,1)},ms.menu.DDTIMER);
  }
}

// incrementally expand/contract the dropdown and change the opacity //
ms.menu.ddSlide = function (c,d){
  var currh = c.offsetHeight;
  var dist;
  if(d == 1){
    dist = (Math.round((c.maxh - currh) / ms.menu.DDSPEED));
  }else{
    dist = (Math.round(currh / ms.menu.DDSPEED));
  }
  if(dist <= 1 && d == 1){
    dist = 1;
  }
  c.style.height = currh + (dist * d) + 'px';
  hfac = currh / c.maxh;
  if (hfac < .1) hfac = 0;
  c.style.opacity = hfac;
  c.style.filter = 'alpha(opacity=' + (hfac * 100) + ')';
  
  if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}