var DDSPEED = 5;
var DDTIMER = 15;
var EINDOPACITY = 99; 

// main function to handle the mouse events //
function ddMenu(id,d){
  
	  if (iDroidYes()=='false') {
	  
	  
	  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.top = '-' + c.offsetHeight + 'px';
	      c.style.display = 'block';
	      c.style.height = 'auto';
	      c.maxh = c.offsetHeight;
	      c.style.height = '0px';
	    }
	    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
	  }else{
	    h.timer = setTimeout(function(){ddCollapse(c)},50);
	  }
	}
}



// 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){
  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 = 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)*(EINDOPACITY/100)-0.01;
  c.style.filter = 'alpha(opacity=' + (currh * EINDOPACITY / c.maxh -1) + ')';
  if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}


function iDroidYes() {
		
		if ((navigator.userAgent.indexOf('iPhone') != -1) ||  
		(navigator.userAgent.indexOf('iPod') != -1) || 
		(navigator.userAgent.indexOf('Android') != -1)) {
		
		iYs='true';
		}  

	else iYs='false';
	return iYs;
}