//** 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: ["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)
submenupointer: ["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 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")
}

}