var DDSPEED = 3;
var DDTIMER = 3;

// main function to handle the mouse events //
function ddMenu(id,d)
{

  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  clearInterval(c.timer);
  if((d == 1) || (d ==2)){
    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(){ddSlide(c,1,id)},DDTIMER);
  }else{
    h.timer = setTimeout(function(){ddCollapse(c,id)},50);
  }
}

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

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

// incrementally expand/contract the dropdown and change the opacity //
function ddSlide(c,d,id){
  var currh = c.offsetHeight;
  var dist;
  
  //Set the link to active or inactive styles
  var l = document.getElementById(id + '-ddlink');
  
  if((d == 1) || (d ==2)){
    l.style.background = 'url(/img/homeform/dolphin/core/grey_grad.jpg) repeat-x left top';
    l.style.color='#000000';
    //l.style.width='99px';
    dist = (Math.round((c.maxh - currh) / DDSPEED));

  }else{
    if (id == 'two')	{
    	l.style.background = 'url(/custom/homeform/dolphin/green_grad.jpg) repeat-x left top';
    } else	{
    	l.style.background = 'url(/img/homeform/dolphin/core/black_grad.jpg) repeat-x left top';
   	}
    l.style.color='#ffffff';
    //l.style.width='99px';
    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 < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}