//** AnyLink JS Drop Down Menu v2.0- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/dropmenuindex.htm
//** January 29th, 2009: Script Creation date

//**May 22nd, 09': v2.1
  //1) Automatically adds a "selectedanchor" CSS class to the currrently selected anchor link
  //2) For image anchor links, the custom HTML attributes "data-image" and "data-overimage" can be inserted to set the anchor's default and over images.

//**June 1st, 09': v2.2
  //1) Script now runs automatically after DOM has loaded. anylinkmenu.init) can now be called in the HEAD section

//**May 23rd, 10': v2.21: Fixes script not firing in IE when inside a frame page

if (typeof dd_domreadycheck=="undefined") //global variable to detect if DOM is ready
  var dd_domreadycheck=false

var anylinkmenu={

menusmap: {},
preloadimages: [],
effects: {delayhide: 0, shadow:{enabled:true, opacity:0.3, depth: [5, 5]}, fade:{enabled:false, 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=anylinkmenu.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({width: menu.dropmenu.offsetWidth+"px", height:menu.dropmenu.offsetHeight+"px"})
    menu.shadow.setcss({left:posx+anylinkmenu.effects.shadow.depth[0]+'px', top:posy+anylinkmenu.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(){anylinkmenu.revealmenu(menuid)}, 20)
  }
},

revealmenu:function(menuid){
  var menu=anylinkmenu.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]
  }
},

setcssclass:function(el, targetclass, action){
  var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig")
  if (action=="check")
    return needle.test(el.className)
  else if (action=="remove")
    el.className=el.className.replace(needle, "")
  else if (action=="add" && !needle.test(el.className))
    el.className+=" "+targetclass
},

hidemenu:function(menuid){
  var menu=anylinkmenu.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
  }
},

addDiv:function(divid, divclass, inlinestyle){
  var el=document.createElement("div")
  if (divid)
    el.id=divid
  el.className=divclass
  if (inlinestyle!="" && typeof el.style.cssText=="string")
    el.style.cssText=inlinestyle
  else if (inlinestyle!="")
    el.setAttribute('style', inlinestyle)
  document.body.appendChild(el)
  return el
},

getmenuHTML:function(menuobj){
  var menucontent=[]
  var frag=""
  for (var i=0; i<menuobj.items.length; i++){
    frag+='<li><a href="./' + menuobj.items[i][1] + '" target="' + menuobj.linktarget + '">' + menuobj.items[i][0] + '</a></li>\n'
    if (menuobj.items[i][2]=="efc" || i==menuobj.items.length-1){
      menucontent.push(frag)
      frag=""
    }
  }
  if (typeof menuobj.cols=="undefined")
    return '<ul>\n' + menucontent.join('') + '\n</ul>'
  else{
    frag=""
    for (var i=0; i<menucontent.length; i++){
      frag+='<div class="' + menuobj.cols.divclass + '" style="' + menuobj.cols.inlinestyle + '">\n<ul>\n' + menucontent[i] + '</ul>\n</div>\n'
    }
    return frag
  }
},

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)
  }
},

domready:function(functionref){ //based on code from the jQuery library
  if (dd_domreadycheck){
    functionref()
    return
  }
  // Mozilla, Opera and webkit nightlies currently support this event
  if (document.addEventListener) {
    // Use the handy event callback
    document.addEventListener("DOMContentLoaded", function(){
      document.removeEventListener("DOMContentLoaded", arguments.callee, false )
      functionref();
      dd_domreadycheck=true
    }, false )
  }
  else if (document.attachEvent){
    // If IE and not an iframe
    // continually check to see if the document is ready
    if ( document.documentElement.doScroll && window == window.top) (function(){
      if (dd_domreadycheck) return
      try{
        // If IE is used, use the trick by Diego Perini
        // http://javascript.nwbox.com/IEContentLoaded/
        document.documentElement.doScroll("left")
      }catch(error){
        setTimeout( arguments.callee, 0)
        return;
      }
      //and execute any waiting functions
      functionref();
      dd_domreadycheck=true
    })();
  }
  if (document.attachEvent && parent.length>0) //account for page being in IFRAME, in which above doesn't fire in IE
    this.addEvent([window], function(){functionref()}, "load");
},

addState:function(anchorobj, state){
  if (anchorobj.getAttribute('data-image')){
    var imgobj=(anchorobj.tagName=="IMG")? anchorobj : anchorobj.getElementsByTagName('img')[0]
    if (imgobj){
      imgobj.src=(state=="add")? anchorobj.getAttribute('data-overimage') : anchorobj.getAttribute('data-image')
    }
  }
  else
    anylinkmenu.setcssclass(anchorobj, "selectedanchor", state)
},

addState:function(anchorobj, state){
  if (anchorobj.getAttribute('data-image')){
    var imgobj=(anchorobj.tagName=="IMG")? anchorobj : anchorobj.getElementsByTagName('img')[0]
    if (imgobj){
      imgobj.src=(state=="add")? anchorobj.getAttribute('data-overimage') : anchorobj.getAttribute('data-image')
    }
  }
  else
    anylinkmenu.setcssclass(anchorobj, "selectedanchor", state)
},

setupmenu:function(targetclass, anchorobj, pos){
  this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
  var relattr=anchorobj.getAttribute("rel");
  if (relattr == null)
  {
    return false;
  }
  dropmenuid=relattr.replace(/\[(\w+)\]/, '')
  var dropmenuvar=window[dropmenuid]
  var dropmenu=this.addDiv(null, dropmenuvar.divclass, dropmenuvar.inlinestyle) //create and add main sub menu DIV
  dropmenu.innerHTML=this.getmenuHTML(dropmenuvar)
  var menu=this.menusmap[targetclass+pos]={
    id: targetclass+pos,
    anchorobj: anchorobj, 
    dropmenu: dropmenu,
    revealtype: (relattr.length!=dropmenuid.length && RegExp.$1=="click")? "click" : "mouseover",
    orientation: anchorobj.getAttribute("rev")=="lr"? "lr" : "ud",
    shadow: this.addDiv(null, "anylinkshadow", null) //create and add corresponding shadow
  }
  menu.anchorobj._internalID=targetclass+pos
  menu.anchorobj._isanchor=true
  menu.dropmenu._internalID=targetclass+pos
  menu.shadow._internalID=targetclass+pos
  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=anylinkmenu.menusmap[this._internalID]
    if (this._isanchor && menu.revealtype=="mouseover" && !anylinkmenu.isContained(this, e)){ //event for anchor
      anylinkmenu.showmenu(menu.id)
      anylinkmenu.addState(this, "add")
    }
    else if (typeof this._isanchor=="undefined"){ //event for drop down menu and shadow
      clearTimeout(menu.hidetimer)
    }
  }, "mouseover")
  this.addEvent([menu.anchorobj, menu.dropmenu, menu.shadow], function(e){ //MOUSEOUT event for anchor, dropmenu, shadow
    if (!anylinkmenu.isContained(this, e)){
      var menu=anylinkmenu.menusmap[this._internalID]
      menu.hidetimer=setTimeout(function(){
        anylinkmenu.addState(menu.anchorobj, "remove")
        anylinkmenu.hidemenu(menu.id)
      }, anylinkmenu.effects.delayhide)
    }
  }, "mouseout")
  this.addEvent([menu.anchorobj, menu.dropmenu], function(e){ //CLICK event for anchor, dropmenu
    var menu=anylinkmenu.menusmap[this._internalID]
    if ( this._isanchor && menu.revealtype=="click"){
      if (menu.dropmenu.style.visibility=="visible")
        anylinkmenu.hidemenu(menu.id)
      else{
        anylinkmenu.addState(this, "add")
        anylinkmenu.showmenu(menu.id)
      }
      if (e.preventDefault)
        e.preventDefault()
      return false
    }
    else
      menu.hidetimer=setTimeout(function(){anylinkmenu.hidemenu(menu.id)}, anylinkmenu.effects.delayhide)
  }, "click")
},

init:function(targetclass){
  this.domready(function(){anylinkmenu.trueinit(targetclass)})
},

trueinit:function(targetclass){
  var anchors=this.getElementsByClass(targetclass)
  var preloadimages=this.preloadimages
  for (var i=0; i<anchors.length; i++){
    if (anchors[i].getAttribute('data-image')){ //preload anchor image?
      preloadimages[preloadimages.length]=new Image()
      preloadimages[preloadimages.length-1].src=anchors[i].getAttribute('data-image')
    }
    if (anchors[i].getAttribute('data-overimage')){ //preload anchor image?
      preloadimages[preloadimages.length]=new Image()
      preloadimages[preloadimages.length-1].src=anchors[i].getAttribute('data-overimage')
    }
    this.setupmenu(targetclass, anchors[i], i)
  }
}

}