//** 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)
        }
}

}