//** 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

//** July 16th, 08'- Updated to v 1.3:
   //1) Adds "Side Bar" orientation option. 
   //2) Drop Down Menus now auto adjust their positioning if too close to either right or bottom window edges.
   //3) Enhanced IFRAME shim "coverage" on the page.

//** July 19th, 08'- Updated to v 1.31: Drop down menu now positions at top of window edge if there's neither room downwards or upwards to settle.
//** Aug 13th, 08'- v1.32: Moved "rel" attribute from menu's <li> elements to inner <a>, for validation reasons

//** Sept 10th, 08'- Updated to v 1.4:
   //1) Added optional "sliding" animation when sub menus are revealed.
   //2) Arrow images now dynamically positioned, instead of relying on CSS's "right" property

//** Oct 11th, 08'- Updated to v 1.5:
   //1) Sliding animation behavior tweaked
   //2) Added ability to disable iframeshim, customize speed of sliding animation

var ddlevelsmenu={

enableshim: true, //enable IFRAME shim to prevent drop down menus from being hidden below SELECT or FLASH elements? (tip: disable if not in use, for efficiency)
downarrowpointer: ["js/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)
rightarrowpointer: ["js/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 entire menu disappears onmouseout.
revealanimate: [true, 10], //enable sliding animation when revealing sub menus? [Bool, int_steps] (steps: 5-100, where lower=faster)
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 item links
subuls: {}, //object array containing all ULs
lastactivesubul: {}, //object object containing info for last mouse out menu item's UL
topitemsindex: -1,
ulindex: -1,
hidetimers: {}, //object array timer
shimadded: false,
nonFF: !/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent), //detect non FF browsers
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.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, BeforeorAfter){
   var pointer=document.createElement("img")
   pointer.src=imginfo[0]
   pointer.style.width=imginfo[1]+"px"
   pointer.style.height=imginfo[2]+"px"
   pointer.style.left=target.offsetWidth-imginfo[2]-2+"px"
   pointer.className=imgclass
   if (BeforeorAfter=="before")
      target.insertBefore(pointer, target.firstChild)
   else
      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.className="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){}
   return shim
},

positionshim:function(header, submenu, dir, scrollX, scrollY){
   if (header._istoplevel){
      var scrollY=window.pageYOffset? window.pageYOffset : this.standardbody.scrollTop
      var topgap=header._offsets.top-scrollY
      var bottomgap=scrollY+this.docheight-header._offsets.top-header._dimensions.h
      if (topgap>0){
         this.shimmy.topshim.style.left=scrollX+"px"
         this.shimmy.topshim.style.top=scrollY+"px"
         this.shimmy.topshim.style.width="99%"
         this.shimmy.topshim.style.height=topgap+"px" //distance from top window edge to top of menu item
      }
      if (bottomgap>0){
         this.shimmy.bottomshim.style.left=scrollX+"px"
         this.shimmy.bottomshim.style.top=header._offsets.top + header._dimensions.h +"px"
         this.shimmy.bottomshim.style.width="99%"
         this.shimmy.bottomshim.style.height=bottomgap+"px" //distance from bottom of menu item to bottom window edge
      }
   }
},

hideshim:function(){
   this.shimmy.topshim.style.width=this.shimmy.bottomshim.style.width=0
   this.shimmy.topshim.style.height=this.shimmy.bottomshim.style.height=0
},


buildmenu:function(mainmenuid, header, submenu, submenupos, istoplevel, dir){
   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)){
         var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
         if (this._istoplevel){
            ddlevelsmenu.css(this, "selected", "add")
         clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos])
         }
         ddlevelsmenu.getoffsetof(header)
         var scrollX=window.pageXOffset? window.pageXOffset : ddlevelsmenu.standardbody.scrollLeft
         var scrollY=window.pageYOffset? window.pageYOffset : ddlevelsmenu.standardbody.scrollTop
         var submenurightedge=this._offsets.left + this._dimensions.submenuw + (this._istoplevel && dir=="topbar"? 0 : this._dimensions.w)
         var submenubottomedge=this._offsets.top + this._dimensions.submenuh
         //Sub menu starting left position
         var menuleft=(this._istoplevel? this._offsets.left + (dir=="sidebar"? this._dimensions.w : 0) : this._dimensions.w)
         if (submenurightedge-scrollX>ddlevelsmenu.docwidth){
            menuleft+= -this._dimensions.submenuw + (this._istoplevel && dir=="topbar" ? this._dimensions.w : -this._dimensions.w)
         }
         submenu.style.left=menuleft+"px"
         //Sub menu starting top position
         var menutop=(this._istoplevel? this._offsets.top + (dir=="sidebar"? 0 : this._dimensions.h) : this.offsetTop)
         if (submenubottomedge-scrollY>ddlevelsmenu.docheight){ //no room downwards?
            if (this._dimensions.submenuh<this._offsets.top+(dir=="sidebar"? this._dimensions.h : 0)-scrollY){ //move up?
               menutop+= - this._dimensions.submenuh + (this._istoplevel && dir=="topbar"? -this._dimensions.h : this._dimensions.h)
            }
            else{ //top of window edge
               menutop+= -(this._offsets.top-scrollY) + (this._istoplevel && dir=="topbar"? -this._dimensions.h : 0)
            }
         }
         submenu.style.top=menutop+"px"
         if (ddlevelsmenu.enableshim && (ddlevelsmenu.revealanimate[0]==false || ddlevelsmenu.nonFF)){ //apply shim immediately only if animation is turned off, or if on, in non FF2.x browsers
            ddlevelsmenu.positionshim(header, submenu, dir, scrollX, scrollY)
         }
         else{
            submenu.FFscrollInfo={x:scrollX, y:scrollY}
         }
         ddlevelsmenu.showmenu(header, submenu, dir)
      }
   }, "mouseover")
   this.addEvent(header, function(e){ //mouseout event
      var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)]
      if (this._istoplevel){
         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)){
         ddlevelsmenu.hidemenu(submenu)
      }

   }, "mouseout")
},

showmenu:function(header, submenu, dir){
   if (this.revealanimate[0]){
      submenu._curanimatepoint=0
      var endpoint=(header._istoplevel && dir=="topbar")? header._dimensions.submenuh : header._dimensions.submenuw
      submenu.style.width=submenu.style.height=0
      submenu.style.overflow="hidden"
      submenu.style.visibility="visible"
      clearTimeout(submenu._animatetimer)
      submenu._animatetimer=setInterval(function(){ddlevelsmenu.revealmenu(header, submenu, endpoint, dir)}, 10)
   }
   else{
      submenu.style.visibility="visible"
   }
},

revealmenu:function(header, submenu, endpoint, dir){
   if (submenu._curanimatepoint<endpoint){
      if (submenu._curanimatepoint==0) //reset either width or height of sub menu to "auto" when animation begins
         submenu.style[header._istoplevel && dir=="topbar"? "width" : "height"]="auto"
      submenu.style[header._istoplevel && dir=="topbar"? "height" : "width"]=submenu._curanimatepoint+"px"
   }
   else{
      submenu.style[header._istoplevel && dir=="topbar"? "height" : "width"]=endpoint+"px"
      if (this.enableshim && submenu.FFscrollInfo) //if this is FF browser (meaning shim hasn't been applied yet
         this.positionshim(header, submenu, dir, submenu.FFscrollInfo.x, submenu.FFscrollInfo.y)
      submenu.style[header._istoplevel && dir=="topbar"? "height" : "width"]="auto"
      submenu.style.overflow="visible"
      clearInterval(submenu._animatetimer)
   }
   submenu._curanimatepoint= submenu._curanimatepoint + Math.round((endpoint-submenu._curanimatepoint)/this.revealanimate[1]) + 1
},


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")
      if (this.enableshim)
         this.hideshim()
   }
   clearTimeout(submenu._animatetimer)
   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, dir){
   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 hide entire menu timer
   if (this.enableshim && !this.shimadded){
      this.shimmy={}
      this.shimmy.topshim=this.addshimmy(document.body) //create top iframe shim obj
      this.shimmy.bottomshim=this.addshimmy(document.body) //create bottom iframe shim obj
      this.shimadded=true
   }
   var menubar=document.getElementById(mainmenuid)
   var alllinks=menubar.getElementsByTagName("a")
   this.getwindowsize()
   for (var i=0; i<alllinks.length; i++){
      if (alllinks[i].getAttribute('rel')){
         this.topitemsindex++
         this.ulindex++
         var menuitem=alllinks[i]
         this.topitems[mainmenuid][this.topitemsindex]=menuitem //store ref to main menu links
         var dropul=document.getElementById(menuitem.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")
         var arrowpointer=(dir=="sidebar")? "rightarrowpointer" : "downarrowpointer"

         this.addpointer(menuitem, arrowpointer, this[arrowpointer], (dir=="sidebar")? "before" : "after")
         this.buildmenu(mainmenuid, menuitem, dropul, this.ulindex, true, dir) //build top level menu
         dropul.onmouseover=function(){
            clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos])
         }
         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
               if (ddlevelsmenu.enableshim)
                  ddlevelsmenu.hideshim()
               ddlevelsmenu.hidetimers[this._master][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], "rightarrowpointer", this.rightarrowpointer, "before")
            this.buildmenu(mainmenuid, parentli, subuls[c], this.ulindex, false, dir) //build sub level menus
         }
      }
   } //end for loop
   this.addEvent(window, function(){ddlevelsmenu.getwindowsize(); ddlevelsmenu.gettopitemsdimensions()}, "resize")
},

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

}