//
// From http://www.leigeber.com/2008/05/vertical-flyout-javascript-menu/
// michael@leigeber.com
// 
var DDSPEED = 5; // Original Value 10
var DDTIMER = 5; // Original Value 15
var OFFSET = -2;
var ZINT = 100;

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);
    c.style.display = 'block';
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.left = (h.offsetWidth + OFFSET) + 'px';
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
      c.style.height = '0px';
    }
    ZINT = ZINT + 1;
    c.style.zIndex = ZINT;
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else{
    h.timer = setTimeout(function(){ddCollapse(c)},50);
  }
}

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

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);
  }
}

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 > (c.maxh - 2) && d == 1){
    clearInterval(c.timer);
  }else if(dist < 1 && d != 1){
    clearInterval(c.timer);
    c.style.display = 'none';
  }
}

// fdis_open defines  the destination to open when the <dl> tag is clicked. Otherwise the menu
// does not allow the top level of the menu to be click-able; only hover-able.
// You must pass in the id prefix of the <dl> tag ( <dl id="xxx-ddheader"> ),
// and dest is the URL of the link to go to.
// Author: David Carter
// Allows the flyout top-level menu to have a destination.

function fdis_popup(menu_name, dest){ // Open the specified destination when the menu is clicked.
  var c = document.getElementById(menu_name + '-ddcontent');  // Check if there's a submenu.
  if (!c) { window.open(dest,"_blank"); } // If no submenu, don't call ddmenu, just open the destination.
  else {
	  ddMenu(menu_name, -1);  // Hide the submenu, then open the destination.
	  window.open(dest,"_blank");
	  }
}

function fdis_open(menu_name, dest){ // Open the specified destination when the menu is clicked.
  var c = document.getElementById(menu_name + '-ddcontent');  // Check if there's a submenu.
  if (!c) { window.open(dest,"_self"); } // If no submenu, don't call ddmenu, just open the destination.
  else {
	  ddMenu(menu_name, -1);  // Hide the submenu, then open the destination.
	  window.open(dest,"_self");
	  }
}