var DDSPEED = 5;
var DDTIMER = 15;

window.onload=function(){
ddsetHandle('ss');ddsetHandle('re');ddsetHandle('rc');ddsetHandle('ad');}

// set Event Handler //
function ddsetHandle(id){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  h.onmouseover=function(){
    ddMenu(h, c, 1);
  }
  h.onmouseout=function(){
    ddMenu(h, c, -1);
  }
  c.onmouseover=function(){
    cancelHide(h, c);
  }
  c.onmouseout=function(){
    ddMenu(h, c, -1);
  }
  ddMenu(h, c, -1);
}


// main function to handle the mouse events //
function ddMenu(h, c, d){
  clearTimeout(h.timer);
  if(!c.maxh) {
    c.style.overflow = 'hidden';
    if(c.id == 'hm-ddcontent'){
      var a = c.style.width;
      c.style.width = 'auto';
      c.maxh = c.offsetWidth;
      c.style.width = a;
    } else {
      var a = c.style.height;
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
      c.style.height = a;
    }
  }
  if(d == 1){
    if((c.maxh <= c.offsetHeight && c.id != 'hm-ddcontent') || (c.maxh <= c.offsetWidth && c.id == 'hm-ddcontent') || c.style.display != 'none'){return}
    clearInterval(c.timer);
    c.style.display = 'block';
    if(c.id == 'hm-ddcontent'){
      c.style.width = '1px';
    } else {
      c.style.height = '1px';
    }
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else{
    if(c.id != 'hm-ddcontent') {
      h.timer = setTimeout(function(){ddCollapse(c)}, Math.floor(Math.random() * 5000) + 10000);
    } else {
      h.timer = setTimeout(function(){ddCollapse(c)}, Math.floor(Math.random() * 3500) + 16500);
    }
  }
}

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

// cancel the collapse if a user rolls over the dropdown //
function cancelHide(h, c){
  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);
  }
}

// incrementally expand/contract the dropdown and change the opacity //
function ddSlide(c,d){
  var currh;
  var dist;
  var thres;
  if(c.id == 'hm-ddcontent'){
    currh = c.offsetWidth;
    thres = 3;
  } else {
    currh = c.offsetHeight;
    thres = 3;
  }
  if(d == 1){
    dist = (Math.round((c.maxh - currh) / DDSPEED));
  }else{
    dist = (Math.round(currh / DDSPEED));
  }
  if(dist < thres && d != 1) {
    if(c.id == 'hm-ddcontent'){
      c.style.width = '0px';
    } else {
      c.style.height = '0px';
    }
    c.style.display = 'none';
    c.style.opacity = 0;
    clearInterval(c.timer);
  } else if(dist < thres && d == 1) {
    if(c.id == 'hm-ddcontent'){
      c.style.width = c.maxh + 'px';
    } else {
      c.style.height = c.maxh + 'px';
    }
    c.style.opacity = 1;
    clearInterval(c.timer);
  } else {
    if(c.id == 'hm-ddcontent'){
      c.style.width = currh + (dist * d) + 'px';
    } else {
      c.style.height = currh + (dist * d) + 'px';
    }
    c.style.opacity = currh / c.maxh;
  }
}