// JavaScript Document
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");   
  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";   
    }   
    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 //   
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.height = currh + (dist * d) + "px";   
  c.style.opacity = currh / c.maxh;   
  c.style.filter = "alpha(opacity=" + (currh * 100 / c.maxh) + ")";

  if((currh < 5 && d != 1) || (currh > (c.maxh - 2) && d == 1)){   
    clearInterval(c.timer); 
 
  } 
 
}