var DDSPEED = 10;
var DDTIMER = 15;

// main function to handle the mouse events //
function ddMenu(id, d) {
  
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');

  ddDebug("ddMenu ");  //custom
  h.className = "headerOver"; //custom

  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';
    }

    h.className = "headerOver"; //custom
    c.timer = setInterval(function() { ddSlide(c, 1) }, DDTIMER);
    
  } else {

      h.className = ""; //custom
      h.timer = setTimeout(function() { ddCollapse(c) }, 50);
  }

}

// collapse the menu //
function ddCollapse(c) {

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

    ddDebug("ddCollapse ");  //custom
    
}

// 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');
  
  h.className = "headerOver"; //custom
  
  clearTimeout(h.timer);
  clearInterval(c.timer);
    
  if (c.offsetHeight < c.maxh) {
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }

  ddDebug("cancelHide ");  //custom
  
}

// incrementally expand/contract the dropdown and change the opacity //
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 < 10 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
      clearInterval(c.timer);

      //custom. remove header A:HOVER
      if (d < 1) {
          ddDebug("stop ");  //custom
          document.getElementById(c.id.replace("ddcontent", "ddheader")).className = "";
      }
  }

  //ddDebug("ddSlide ");  //custom
  
}


//custom
function ddDebug(str) {
    
    return;
    
    document.body.getElementsByTagName("span")[0].innerHTML += str;

   
}