//** Based on AnyLink CSS Menu:

//** AnyLink CSS Menu v2.0- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/anylinkcss.htm
//** January 19', 2009: Script Creation date

//** Modified by Matjaz Gregoric <mtyaka@gmail.com>


var anylinkcssmenu={

menusmap: {},
effects: {delayhide: 200, shadow:{enabled:true, opacity:0.3, depth: [0, 0]}, fade:{enabled:true, duration:500}}, //customize menu effects

dimensions: {},

getoffset:function(what, offsettype){
  return (what.offsetParent)? what[offsettype]+this.getoffset(what.offsetParent, offsettype) : what[offsettype]
},

getoffsetof:function(el){
  el._offsets={left:this.getoffset(el, "offsetLeft"), top:this.getoffset(el, "offsetTop"), h: el.offsetHeight}
},

getdimensions:function(menu){
  this.dimensions={anchorw:menu.anchorobj.offsetWidth, anchorh:menu.anchorobj.offsetHeight,
    docwidth:(window.innerWidth ||this.standardbody.clientWidth)-20,
    docheight:(window.innerHeight ||this.standardbody.clientHeight)-15,
    docscrollx:window.pageXOffset || this.standardbody.scrollLeft,
    docscrolly:window.pageYOffset || this.standardbody.scrollTop
  }
  if (!this.dimensions.dropmenuw){
    this.dimensions.dropmenuw=menu.dropmenu.offsetWidth
    this.dimensions.dropmenuh=menu.dropmenu.offsetHeight
  }
},

isContained:function(m, e){
  var e=window.event || e
  var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement)
  while (c && c!=m)try {c=c.parentNode} catch(e){c=m}
  if (c==m)
    return true
  else
    return false
},

setopacity:function(el, value){
  el.style.opacity=value
  if (typeof el.style.opacity!="string"){ //if it's not a string (ie: number instead), it means property not supported
    el.style.MozOpacity=value
    if (el.filters){
      el.style.filter="progid:DXImageTransform.Microsoft.alpha(opacity="+ value*100 +")"
    }
  }
},

showmenu:function(menuid){
  var menu=anylinkcssmenu.menusmap[menuid]
  clearTimeout(menu.hidetimer)
  this.getoffsetof(menu.anchorobj)
  this.getdimensions(menu)
  var posx=menu.anchorobj._offsets.left + (menu.orientation=="lr"? this.dimensions.anchorw : 0) //base x pos
  var posy=menu.anchorobj._offsets.top+this.dimensions.anchorh - (menu.orientation=="lr"? this.dimensions.anchorh : 0)//base y pos
  if (posx+this.dimensions.dropmenuw+this.effects.shadow.depth[0]>this.dimensions.docscrollx+this.dimensions.docwidth){ //drop left instead?
    posx=posx-this.dimensions.dropmenuw + (menu.orientation=="lr"? -this.dimensions.anchorw : this.dimensions.anchorw)
  }
  if (posy+this.dimensions.dropmenuh>this.dimensions.docscrolly+this.dimensions.docheight){  //drop up instead?
    posy=Math.max(posy-this.dimensions.dropmenuh - (menu.orientation=="lr"? -this.dimensions.anchorh : this.dimensions.anchorh), this.dimensions.docscrolly) //position above anchor or window's top edge
  }
  if (this.effects.fade.enabled){
    this.setopacity(menu.dropmenu, 0) //set opacity to 0 so menu appears hidden initially
    if (this.effects.shadow.enabled)
      this.setopacity(menu.shadow, 0) //set opacity to 0 so shadow appears hidden initially
  }
  menu.dropmenu.setcss({left:posx+'px', top:posy+'px', visibility:'visible'})
  if (this.effects.shadow.enabled)
    menu.shadow.setcss({left:posx+anylinkcssmenu.effects.shadow.depth[0]+'px', top:posy+anylinkcssmenu.effects.shadow.depth[1]+'px', visibility:'visible'})
  if (this.effects.fade.enabled){
    clearInterval(menu.animatetimer)
    menu.curanimatedegree=0
    menu.starttime=new Date().getTime() //get time just before animation is run
    menu.animatetimer=setInterval(function(){anylinkcssmenu.revealmenu(menuid)}, 20)
  }
},

revealmenu:function(menuid){
  var menu=anylinkcssmenu.menusmap[menuid]
  var elapsed=new Date().getTime()-menu.starttime //get time animation has run
  if (elapsed<this.effects.fade.duration){
    this.setopacity(menu.dropmenu, menu.curanimatedegree)
    if (this.effects.shadow.enabled)
      this.setopacity(menu.shadow, menu.curanimatedegree*this.effects.shadow.opacity)
  }
  else{
    clearInterval(menu.animatetimer)
    this.setopacity(menu.dropmenu, 1)
    menu.dropmenu.style.filter=""
  }
  menu.curanimatedegree=(1-Math.cos((elapsed/this.effects.fade.duration)*Math.PI)) / 2
},

setcss:function(param){
  for (prop in param){
    this.style[prop]=param[prop]
  }
},

hidemenu:function(menuid){
  var menu=anylinkcssmenu.menusmap[menuid]
  clearInterval(menu.animatetimer)
  menu.dropmenu.setcss({visibility:'hidden', left:0, top:0})
  menu.shadow.setcss({visibility:'hidden', left:0, top:0})
},

getElementsByClass:function(targetclass){
  if (document.querySelectorAll)
    return document.querySelectorAll("."+targetclass)
  else{
    var classnameRE=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "i") //regular expression to screen for classname
    var pieces=[]
    var alltags=document.all? document.all : document.getElementsByTagName("*")
    for (var i=0; i<alltags.length; i++){
      if (typeof alltags[i].className=="string" && alltags[i].className.search(classnameRE)!=-1)
        pieces[pieces.length]=alltags[i]
    }
    return pieces
  }
},

addEvent:function(targetarr, functionref, tasktype){
  if (targetarr.length>0){
    var target=targetarr.shift()
    if (target.addEventListener)
      target.addEventListener(tasktype, functionref, false)
    else if (target.attachEvent)
      target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)})
    this.addEvent(targetarr, functionref, tasktype)
  }
},

setupmenu:function(targetclass, anchorobj, pos){
  this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
  var relattr=anchorobj.getAttribute("rel")
  var dropmenuid=relattr.replace(/\[(\w+)\]/, '')
  var menu=this.menusmap[targetclass+pos]={
    id: targetclass+pos,
    anchorobj: anchorobj,  
    dropmenu: document.getElementById(dropmenuid),
    revealtype: (relattr.length!=dropmenuid.length && RegExp.$1=="click")? "click" : "mouseover",
    orientation: anchorobj.getAttribute("rev")=="lr"? "lr" : "ud",
    shadow: document.createElement("div")
  }
  menu.anchorobj._internalID=targetclass+pos
  menu.anchorobj._isanchor=true
  menu.dropmenu._internalID=targetclass+pos
  menu.shadow._internalID=targetclass+pos
  menu.shadow.className="anylinkshadow"
  document.body.appendChild(menu.dropmenu) //move drop down div to end of page
  document.body.appendChild(menu.shadow)
  menu.dropmenu.setcss=this.setcss
  menu.shadow.setcss=this.setcss
  menu.shadow.setcss({width: menu.dropmenu.offsetWidth+"px", height:menu.dropmenu.offsetHeight+"px"})
  this.setopacity(menu.shadow, this.effects.shadow.opacity)
  this.addEvent([menu.anchorobj, menu.dropmenu, menu.shadow], function(e){ //MOUSEOVER event for anchor, dropmenu, shadow
    var menu=anylinkcssmenu.menusmap[this._internalID]
    if (this._isanchor && menu.revealtype=="mouseover" && !anylinkcssmenu.isContained(this, e)){ //event for anchor
      anylinkcssmenu.showmenu(menu.id)
    }
    else if (typeof this._isanchor=="undefined"){ //event for drop down menu and shadow
      clearTimeout(menu.hidetimer)
    }
  }, "mouseover")
  if (menu.revealtype == 'mouseover') {
    this.addEvent([menu.anchorobj, menu.dropmenu, menu.shadow], function(e){ //MOUSEOUT event for anchor, dropmenu, shadow
      if (!anylinkcssmenu.isContained(this, e)){
        var menu=anylinkcssmenu.menusmap[this._internalID]
        menu.hidetimer=setTimeout(function(){anylinkcssmenu.hidemenu(menu.id)}, anylinkcssmenu.effects.delayhide)
      }
    }, "mouseout")
  }
  this.addEvent([menu.anchorobj, menu.dropmenu], function(e){ //CLICK event for anchor, dropmenu
    var menus=anylinkcssmenu.menusmap;
    var menu=menus[this._internalID];
    for (m in menus){
      if (m!=menu) anylinkcssmenu.hidemenu(m)
    }
    if (this._isanchor && menu.revealtype=="click"){
      if (menu.dropmenu.style.visibility=="visible")
        anylinkcssmenu.hidemenu(menu.id)
      else
        anylinkcssmenu.showmenu(menu.id)
      if (e.preventDefault)
        e.preventDefault();
      e.cancelBubble = true;
      if (e.stopPropagation) e.stopPropagation();
      return false
    }
    else
      menu.hidetimer=setTimeout(function(){anylinkcssmenu.hidemenu(menu.id)}, anylinkcssmenu.effects.delayhide)
  }, "click")
},

init:function(targetclass){
  var anchors=this.getElementsByClass(targetclass)
  for (var i=0; i<anchors.length; i++){
    this.setupmenu(targetclass, anchors[i], i)
  }
  var menus=this.menusmap
  this.addEvent([document.body], function(e){
    for (menu in menus){
      anylinkcssmenu.hidemenu(menu)
    }
  }, "click")
}

}