//** 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

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

var anylinkmenu={

menusmap: {},
preloadimages: [],
effects: {delayhide: 200, 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")
     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)
     }
}

}