//** All Levels Navigational Menu- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/ddlevelsmenu/
//** Usage Terms: http://www.dynamicdrive.com/notice.htm

//** July 7th , 08'- Creation Date


var ddlevelsmenu={

mainmenupointer: ["images/arrow-down.gif", 11,7], //path to "down arrow" image that gets added to main menu items (last 2 parameters should be width/height of img)
submenupointer: ["images/arrow-right.gif", 12,12], //path to "right arrow" image that gets added to LI elements within drop down menu containing additional menus
hideinterval: 200, //delay in milliseconds before sub menu(s) disappears onmouseout.
httpsiframesrc: "blank.htm", //If menu is run on a secure (https) page, the IFRAME shim feature used by the script should point to an *blank* page *within* the secure area to prevent an IE security prompt. Specify full URL to that page on your server (leave as is if not applicable).

///No need to edit beyond here////////////////////

topmenuids: [], //array containing ids of all the primary menus on the page
topitems: {}, //object array containing all top menu items
subuls: {}, //object array containing all ULs
topitemsindex: -1,
ulindex: -1,
hidetimers: {}, //object array timer
shimadded: false,

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")}
},

getwindowsize:function(){
        this.docwidth=window.innerWidth? window.innerWidth-10 : this.standardbody.clientWidth-10
        this.docheight=window.innerHeight? window.innerHeight-15 : this.standardbody.clientHeight-18
},

gettopitemsdimensions:function(){
        for (var m=0; m<this.topmenuids.length; m++){
                var topmenuid=this.topmenuids[m]
                for (var i=0; i<this.topitems[topmenuid].length; i++){
                        var header=this.topitems[topmenuid][i]
                        var submenu=document.getElementById(header.parentNode.getAttribute('rel'))
                        header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.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
},

addpointer:function(target, imgclass, imginfo){
        var pointer=document.createElement("img")
        pointer.src=imginfo[0]
        pointer.style.width=imginfo[1]+"px"
        pointer.style.height=imginfo[2]+"px"
        pointer.className=imgclass
        target.appendChild(pointer)
},

css: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
},

addshimmy:function(target){
        var shim=(!window.opera)? document.createElement("iframe") : document.createElement("div") //Opera 9.24 doesnt seem to support transparent IFRAMEs
        shim.id="ddiframeshim"
        shim.setAttribute("src", location.protocol=="https:"? this.httpsiframesrc : "about:blank")
        shim.setAttribute("frameborder", "0")
        target.appendChild(shim)
        try{
                shim.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
        }
        catch(e){}
        this.shimadded=true
        return shim
},

positionshim:function(header, submenu){
        this.docscrollY=window.pageYOffset? window.pageYOffset : this.standardbody.scrollTop
        if (header._istoplevel){
                this.shimobj.style.left=0
                this.shimobj.style.top=submenu.style.top
        }
        this.shimobj.style.width="99%"
        this.shimobj.style.height=parseInt(this.docscrollY)+this.docheight-parseInt(this.shimobj.style.top)+"px"
},

hideshim:function(){
        this.shimobj.style.width=this.shimobj.style.height=0
},


buildmenu:function(mainmenuid, header, submenu, submenupos, istoplevel){
        header._master=mainmenuid //Indicate which top menu this header is associated with
        header._pos=submenupos //Indicate pos of sub menu this header is associated with
        header._istoplevel=istoplevel
        if (istoplevel){
                this.addEvent(header, function(e){
                ddlevelsmenu.hidemenu(ddlevelsmenu.subuls[this._master][parseInt(this._pos)])
                }, "click")
        }
        this.subuls[mainmenuid][submenupos]=submenu
        header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.offsetHeight}
        this.getoffsetof(header)
        submenu.style.left=0
        submenu.style.top=0
        submenu.style.visibility="hidden"
        this.addEvent(header, function(e){ //mouseover event
                if (!ddlevelsmenu.isContained(this, e)){
                        if (typeof ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)]!="undefined")
                                clearTimeout(ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)])
                        if (this._istoplevel)
                                ddlevelsmenu.css(this, "selected", "add")
                        var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
                        ddlevelsmenu.getoffsetof(header)
                        var submenurightedge=this._offsets.left+this._dimensions.submenuw+(this._istoplevel? 0 : this._dimensions.w)
                        if (submenurightedge<ddlevelsmenu.docwidth){
                                submenu.style.left=((this._istoplevel)? this._offsets.left : this._dimensions.w)+"px"
                        }
                        else{
                                submenu.style.left=this._dimensions.submenuw*(-1)+((this._istoplevel)? this._offsets.left+this._dimensions.w : 0)+"px"
                        }
                        submenu.style.top=((this._istoplevel)? this._offsets.top+this._dimensions.h : this.offsetTop)+"px"
                        ddlevelsmenu.positionshim(this, submenu)
                        submenu.style.visibility="visible"
                }
        }, "mouseover")
        this.addEvent(header, function(e){ //mouseout event
                if (this._istoplevel){
                        var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
                        if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(submenu, e)) //hide drop down ul if mouse moves out of menu bar item but not into drop down ul itself
                                ddlevelsmenu.hidemenu(submenu)
                }
                else if (!this._istoplevel && !ddlevelsmenu.isContained(this, e)){
                        var headerlist=this
                        ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)]=setTimeout(function(){
                                var submenu=ddlevelsmenu.subuls[headerlist._master][parseInt(headerlist._pos)]
                                ddlevelsmenu.hidemenu(submenu)
                        }, ddlevelsmenu.hideinterval)
                }
        }, "mouseout")
},

hidemenu:function(submenu){
        if (typeof submenu._pos!="undefined"){ //if submenu is outermost UL drop down menu
                this.css(this.topitems[submenu._master][parseInt(submenu._pos)], "selected", "remove")
                this.hideshim()
        }
        submenu.style.left=0
        submenu.style.top="-1000px"
        submenu.style.visibility="hidden"
},


addEvent:function(target, functionref, tasktype) {
        if (target.addEventListener)
                target.addEventListener(tasktype, functionref, false);
        else if (target.attachEvent)
                target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)});
},

init:function(mainmenuid, orientation){
        this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
        this.topitemsindex=-1
        this.ulindex=-1
        this.topmenuids.push(mainmenuid)
        this.topitems[mainmenuid]=[] //declare array on object
        this.subuls[mainmenuid]=[] //declare array on object
        this.hidetimers[mainmenuid]=[] //declare array on object
        if (!this.shimadded){
                this.shimobj=this.addshimmy(document.body) //create iframe shim obj
        }
        var menubar=document.getElementById(mainmenuid)
        var menuitems=menubar.getElementsByTagName("*")
        this.getwindowsize()
        for (var i=0; i<menuitems.length; i++){
                if (menuitems[i].getAttribute('rel')){
                        this.topitemsindex++
                        this.ulindex++
                        var menulink=menuitems[i].getElementsByTagName("a")[0]
                        this.topitems[mainmenuid][this.topitemsindex]=menulink //store ref to main menu links
                        var dropul=document.getElementById(menuitems[i].getAttribute('rel'))
                        dropul.style.zIndex=2000 //give drop down menus a high z-index
                        dropul._master=mainmenuid  //Indicate which main menu this main UL is associated with
                        dropul._pos=this.topitemsindex //Indicate which main menu item this main UL is associated with
                        this.addEvent(dropul, function(){ddlevelsmenu.hidemenu(this)}, "click")
                        this.addpointer(menulink, "mainmenupointer", this.mainmenupointer)
                        this.buildmenu(mainmenuid, menulink, dropul, this.ulindex, true) //build top level menu
                        //dropul.onmouseover=function(){
                                //do nothing
                        //}
                        this.addEvent(dropul, function(e){ //hide menu if mouse moves out of main UL element into open space
                                if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(ddlevelsmenu.topitems[this._master][parseInt(this._pos)], e)){
                                        var dropul=this
                                        ddlevelsmenu.hidetimers[this._master][parseInt(this._pos)]=setTimeout(function(){
                                                ddlevelsmenu.hidemenu(dropul)
                                        }, ddlevelsmenu.hideinterval)
                                }
                        }, "mouseout")
                        var subuls=dropul.getElementsByTagName("ul")
                        for (var c=0; c<subuls.length; c++){
                                this.ulindex++
                                var parentli=subuls[c].parentNode
                                this.addpointer(parentli.getElementsByTagName("a")[0], "submenupointer", this.submenupointer)
                                this.buildmenu(mainmenuid, parentli, subuls[c], this.ulindex, false) //build sub level menus
                        }
                }
        } //end for loop
        this.addEvent(window, function(){ddlevelsmenu.getwindowsize(); ddlevelsmenu.gettopitemsdimensions()}, "resize")
},

setup:function(mainmenuid, orientation){
        this.addEvent(window, function(){ddlevelsmenu.init(mainmenuid, orientation)}, "load")
}

}