/* ypSlideOutMenu v1.0*/
ypSlideOutMenu.Registry = []
ypSlideOutMenu.aniLen = 250
ypSlideOutMenu.hideDelay = 350
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

  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
    this.isActive   = true

    // 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
    d.write('<style type="text/css">')
    d.write('#' + this.id +'Container { visibility:hidden;')
    d.write('left:' + left +'px;')
    d.write('top:' + top +'px;')
    d.write('overflow:hidden; }')
    d.write('#' + this.id +'Container, #' + this.id +'Content { position:absolute;')
    d.write('width:' + width +'px;')
    d.write('height:' + height +'px;')
    //d.write('clip:rect(0' + width +'' + height +' 0);')
    d.write('}')
    d.write('</style>')

    this.load()
  }
}

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.showMenu = function(id)
{
  var reg = ypSlideOutMenu.Registry
  var obj = ypSlideOutMenu.Registry[id]

  if (obj.container && obj.isActive) {
    obj.over = true
	
	if (id == "menu1") {
	  MM_swapImage('menu1','','../images/btn_comp_1.gif',1)
	  MM_swapImage('menu2','','../images/btn_serv_0.gif',1)
	  MM_swapImage('menu3','','../images/btn_proj_1.gif',1)
	  MM_swapImage('menu4','','../images/btn_peop_0.gif',1)
	} else if (id == "menu2") {
	  MM_swapImage('menu1','','../images/btn_comp_0.gif',1)
	  MM_swapImage('menu2','','../images/btn_serv_1.gif',1)
	  MM_swapImage('menu3','','../images/btn_proj_1.gif',1)
	  MM_swapImage('menu4','','../images/btn_peop_0.gif',1)
	} else if (id == "menu3") {
	  MM_swapImage('menu1','','../images/btn_comp_0.gif',1)
	  MM_swapImage('menu2','','../images/btn_serv_0.gif',1)
	  MM_swapImage('menu3','','../images/btn_proj_1.gif',1)
	  MM_swapImage('menu4','','../images/btn_peop_0.gif',1)
	} else if (id == "menu4") {
	  MM_swapImage('menu1','','../images/btn_comp_0.gif',1)
	  MM_swapImage('menu2','','../images/btn_serv_0.gif',1)
	  MM_swapImage('menu3','','../images/btn_proj_1.gif',1)
	  MM_swapImage('menu4','','../images/btn_peop_1.gif',1)
	}
	
    // close other menus.
    for (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.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 && obj.isActive) {
    if (obj.hideTimer) window.clearTimeout(obj.hideTimer)
    obj.hideTimer = window.setTimeout("ypSlideOutMenu.hide('" + id + "')", ypSlideOutMenu.hideDelay);
  }
}

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)
	  if (obj.id == "menu1") {
	  MM_swapImage('menu1','','../images/btn_comp_0.gif',1)
	} else if (obj.id == "menu2") {
	  MM_swapImage('menu2','','../images/btn_serv_0.gif',1)
	} else if (obj.id == "menu3") {
	  MM_swapImage('menu3','','../images/btn_proj_1.gif',1)
	} else if (obj.id == "menu4") {
	  MM_swapImage('menu4','','../images/btn_peop_0.gif',1)
	}
  }
}

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() { }