var DDSPEED = 10;
var DDTIMER = 15;

// main function to handle the mouse events //
function ddMenu(id,d,id_div,id_popup){
  var h = document.getElementById(id_div);
  var c = document.getElementById(id_popup);
 clearInterval(c.timer);
  if(d == 1){
    clearTimeout(h.timer);
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.top = '-' + c.offsetHeight + 'px';
      c.style.display = 'block';
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
	  c.style.bottom = '60px';
	  c.style.height = '0px';
	  

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

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

}

}
   
function ddMenu1(id,d,id_div,id_popup){
  var h = document.getElementById(id_div);
  var c = document.getElementById(id_popup);
 clearInterval(c.timer);
  if(d == 1){
    clearTimeout(h.timer);
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.top = '-' + c.offsetHeight + 'px';
      c.style.display = 'block';
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
	  c.style.bottom = '50px';
      c.style.height = '0px';
    }
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else{
    h.timer = setTimeout(function(){ddCollapse(c)},50);
  }
   var t=setTimeout(function(){ddCollapse(c)},5000);
}
// collapse the menu //
function ddCollapse(c){
   c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);

}

// cancel the collapse if a user rolls over the dropdown cent //
function cancelHide(id,id_div,id_popup){
 var h = document.getElementById(id_div);
  var c = document.getElementById(id_popup);
 clearTimeout(h.timer);
  clearInterval(c.timer);
  if(c.offsetHeight < c.maxh){
      c.timer = setInterval(function() { ddSlide(c, 1) }, DDTIMER);
    
}


//c.style.top = '-' + c.offsetHeight - 4 + 'px';
//c.style.height = '0px';
}

// 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.top = parseInt(c.style.top.replace('px','')) - parseInt(dist * d) + 'px';
  c.style.height = currh + (dist * d) + 'px';  
  c.style.opacity = currh / c.maxh;
  if (c.style.height == '4px') {
      c.style.height = '0px';
      c.style.top = '0px';
      c.style.opacity = '0px';
  }
  c.style.zIndex = currh / c.maxh;
  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);
  }
}