/*****************************************************
 * ypSlideOutMenu
 * http://ypslideoutmenus.sourceforge.net/
 * 3/04/2001
 *
 * a nice little script to create exclusive, slide-out
 * menus for ns4, ns6, mozilla, opera, ie4, ie5 on
 * mac and win32. I've got no linux or unix to test on but
 * it should(?) work...
 *
 * Licensed under AFL 2.0
 * http://www.opensource.org/licenses/afl-2.0.php
 *
 * Revised:
 * - 08/29/2002 : added .hideAll()
 * - 04/15/2004 : added .writeCSS() to support more
 *                than 30 menus.
 *
 * --youngpup--
 *****************************************************/
function findPosX(obj)
{
  var curtop = 0;
  if (obj.offsetParent)
  {
    while (obj.offsetParent)
    {
      curtop += obj.offsetLeft
      obj = obj.offsetParent;
    }
  }
  else if (obj.x)
    curtop += obj.x;
  return curtop;
}
function findPosY(obj)
{
  var curtop = 0;
  if (obj.offsetParent)
  {
    while (obj.offsetParent)
    {
      curtop += obj.offsetTop
      obj = obj.offsetParent;
    }
  }
  else if (obj.y)
    curtop += obj.y;
  return curtop;
}
ypSlideOutMenu.Registry = new Array()
ypSlideOutMenu.aniLen = 300
ypSlideOutMenu.hideDelay = 500
ypSlideOutMenu.minCPUResolution = 10
// constructor
function ypSlideOutMenu(id, dir, left, top, width, height)
{
  this.ie  = document.all ? 1 : 0
  this.ns4 = document.layers ? 1 : 0
  this.dom = document.getElementById ? 1 : 0
  this.css = "";
  if (this.ie || this.ns4 || this.dom) {
    this.id       = id
    this.dir     = dir
    this.orientation = dir == "left" || dir == "right" ? "h" : "v"
    this.dirType   = dir == "right" || dir == "down" ? "-" : "+"
    this.dim     = this.orientation == "h" ? width : height
    this.hideTimer   = false
    this.aniTimer   = false
    this.open     = false
    this.over     = false
    this.startTime   = 0
    // global reference to this object
    this.gRef = "ypSlideOutMenu_"+id
    eval(this.gRef+"=this")
    // add this menu object to an internal list of all menus
    ypSlideOutMenu.Registry[id] = this
    var d = document
    var strCSS = "";
    strCSS += '#' + this.id + 'Container { visibility:hidden; '
    strCSS += 'left:' + left + 'px; '
    strCSS += 'top:' + top + 'px; '
    strCSS += 'overflow:hidden; z-index:10000; }'
    strCSS += '#' + this.id + 'Container, #' + this.id + 'Content { position:absolute; '
    strCSS += 'width:' + width + 'em; '
    strCSS += 'height:' + height + 'px; '
    strCSS += '}'
    this.css = strCSS;
    this.load()
  }
}
ypSlideOutMenu.writeCSS = function() {
  document.writeln('<style type="text/css">');
  for (var id in ypSlideOutMenu.Registry) {
    document.writeln(ypSlideOutMenu.Registry[id].css);
  }
  document.writeln('</style>');
}
ypSlideOutMenu.prototype.load = function() {
  var d = document
  var lyrId1 = this.id + "Container"
  var lyrId2 = this.id + "Content"
  var obj1 = this.dom ? d.getElementById(lyrId1) : this.ie ? d.all[lyrId1] : d.layers[lyrId1]
  if (obj1) var obj2 = this.ns4 ? obj1.layers[lyrId2] : this.ie ? d.all[lyrId2] : d.getElementById(lyrId2)
  var temp
  if (!obj1 || !obj2) window.setTimeout(this.gRef + ".load()", 100)
  else {
    this.container  = obj1
    this.menu    = obj2
    this.style    = this.ns4 ? this.menu : this.menu.style
    this.homePos  = eval("0" + this.dirType + this.dim)
    this.outPos    = 0
    this.accelConst  = (this.outPos - this.homePos) / ypSlideOutMenu.aniLen / ypSlideOutMenu.aniLen
    // set event handlers.
    if (this.ns4) this.menu.captureEvents(Event.MOUSEOVER | Event.MOUSEOUT);
    this.menu.onmouseover = new Function("ypSlideOutMenu.showMenu('" + this.id + "')")
    this.menu.onmouseout = new Function("ypSlideOutMenu.hideMenu('" + this.id + "')")
    //set initial state
    this.endSlide()
  }
}
ypSlideOutMenu.hide = function(id)
{
  var obj = ypSlideOutMenu.Registry[id]
  obj.over = false
  if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
  // flag that this scheduled event has occured.
  obj.hideTimer = 0
  // if this menu is open, close it.
  if (obj.open && !obj.aniTimer) obj.startSlide(false)
}
ypSlideOutMenu.hideMenu = function(id)
{
  // schedules the menu to close after <hideDelay> ms, which
  // gives the user time to cancel the action if they accidentally moused out
  var obj = ypSlideOutMenu.Registry[id]
  if (obj.container) {
    if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
    obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
  }
}
ypSlideOutMenu.showMenu = function(id)
{
  var reg = ypSlideOutMenu.Registry
  var obj = ypSlideOutMenu.Registry[id]
  if (obj.container) {
    obj.over = true
    // close other menus.
    for (var menu in reg) if (id != menu) ypSlideOutMenu.hide(menu)
    // if this menu is scheduled to close, cancel it.
    if (obj.hideTimer) { reg[id].hideTimer = window.clearTimeout(reg[id].hideTimer) }
    // if this menu is closed, open it.
    if (!obj.open && !obj.aniTimer) reg[id].startSlide(true)
  }
}
ypSlideOutMenu.hideAll = function()
{
  var reg = ypSlideOutMenu.Registry
  for ( var menu in reg) {
    ypSlideOutMenu.hide(menu);
    if (menu.hideTimer) window.clearTimeout(menu.hideTimer);
  }
}
ypSlideOutMenu.prototype.startSlide = function(open) {
  this[open ? "onactivate" : "ondeactivate"]()
  this.open = open
  if (open) this.setVisibility(true)
  this.startTime = (new Date()).getTime()
  this.aniTimer = window.setInterval(this.gRef + ".slide()", ypSlideOutMenu.minCPUResolution)
}
ypSlideOutMenu.prototype.slide = function() {
  var elapsed = (new Date()).getTime() - this.startTime
  if (elapsed > ypSlideOutMenu.aniLen) this.endSlide()
  else {
    var d = Math.round(Math.pow(ypSlideOutMenu.aniLen-elapsed, 2) * this.accelConst)
    if (this.open && this.dirType == "-")    d = -d
    else if (this.open && this.dirType == "+")  d = -d
    else if (!this.open && this.dirType == "-")  d = -this.dim + d
    else                    d = this.dim + d
    this.moveTo(d)
  }
}
ypSlideOutMenu.prototype.endSlide = function() {
  this.aniTimer = window.clearTimeout(this.aniTimer)
  this.moveTo(this.open ? this.outPos : this.homePos)
  if (!this.open) this.setVisibility(false)
  if ((this.open && !this.over) || (!this.open && this.over)) {
    this.startSlide(this.over)
  }
}
ypSlideOutMenu.prototype.setVisibility = function(bShow) {
  var s = this.ns4 ? this.container : this.container.style
  s.visibility = bShow ? "visible" : "hidden"
}
ypSlideOutMenu.prototype.moveTo = function(p) {
  this.style[this.orientation == "h" ? "left" : "top"] = this.ns4 ? p : p + "px"
}
ypSlideOutMenu.prototype.getPos = function(c) {
  return parseInt(this.style[c])
}
// events
ypSlideOutMenu.prototype.onactivate    = function() { }
ypSlideOutMenu.prototype.ondeactivate  = function() { }