//** Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)

//** Updated: July 14th 06' to v2.0
//1) Ability to "left", "center", or "right" align the menu items easily, just by modifying the CSS property "text-align".
//2) Added an optional "swipe down" transitional effect for revealing the drop down menus.
//3) Support for multiple Chrome menus on the same page.

//** Updated: Nov 14th 06' to v2.01- added iframe shim technique

//** Updated: July 23rd, 08 to v2.4
//1) Main menu items now remain "selected" (CSS class "selected" applied) when user moves mouse into corresponding drop down menu.
//2) Adds ability to specify arbitrary HTML that gets added to the end of each menu item that carries a drop down menu (ie: a down arrow image).
//3) All event handlers added to the menu are now unobstrusive, allowing you to define your own "onmouseover" or "onclick" events on the menu items.
//4) Fixed elusive JS error in FF that sometimes occurs when mouse quickly moves between main menu items and drop down menus

//** Updated: Oct 29th, 08 to v2.5 (only .js file modified from v2.4)
//1) Added ability to customize reveal animation speed (# of steps)
//2) Menu now works in IE8 beta2 (a valid doctype at the top of the page is required)

var cssdropdown={
   disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
   dropdownindicator: '', //specify full HTML to add to end of each menu item with a drop down menu
   enablereveal: [true, 8], //enable swipe effect? [true/false, steps (Number of animation steps. Integer between 1-20. Smaller=faster)]
   enableiframeshim: 1, //enable "iframe shim" in IE5.5 to IE7? (1=yes, 0=no)

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

   dropmenuobj: null,
   asscmenuitem: null,
   domsupport: document.all || document.getElementById,
   standardbody: null,
   iframeshimadded: false,
   revealtimers: {},

   getposOffset:function(what, offsettype){
      var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
      var parentEl=what.offsetParent;
      while (parentEl!=null){
         // izmena, jer je parent automatski pozicioniran, vratiti ako zasmeta...
         // totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
         totaloffset=(offsettype=="left")? totaloffset : totaloffset+parentEl.offsetTop;
         parentEl=parentEl.offsetParent;
      }
      return totaloffset;
   },

   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
   },

   showmenu:function(dropmenu, e){
      if (this.enablereveal[0]){
         if (!dropmenu._trueheight || dropmenu._trueheight<10)
            dropmenu._trueheight=dropmenu.offsetHeight
         clearTimeout(this.revealtimers[dropmenu.id])
         dropmenu.style.height=dropmenu._curheight=0
         dropmenu.style.overflow="hidden"
         dropmenu.style.visibility="visible"
         this.revealtimers[dropmenu.id]=setInterval(function(){
            cssdropdown.revealmenu(dropmenu)
            }, 10)
      }
      else{
         dropmenu.style.visibility="visible"
      }
      this.css(this.asscmenuitem, "selected", "add")
   },

   revealmenu:function(dropmenu, dir){
      var curH=dropmenu._curheight, maxH=dropmenu._trueheight, steps=this.enablereveal[1]
      if (curH<maxH){
         var newH=Math.min(curH, maxH)
         dropmenu.style.height=newH+"px"
         dropmenu._curheight= newH + Math.round((maxH-newH)/steps) + 1
      }
      else{ //if done revealing menu
         dropmenu.style.height="auto"
         dropmenu.style.overflow="hidden"
         clearInterval(this.revealtimers[dropmenu.id])
      }
   },

   clearbrowseredge:function(obj, whichedge){
      var edgeoffset=0
      if (whichedge=="rightedge"){
         var windowedge=document.all && !window.opera? this.standardbody.scrollLeft+this.standardbody.clientWidth-15 : window.pageXOffset+window.innerWidth-15
         var dropmenuW=this.dropmenuobj.offsetWidth
         if (windowedge-this.dropmenuobj.x < dropmenuW)  //move menu to the left?
            edgeoffset=dropmenuW-obj.offsetWidth
      }
      else{
         var topedge=document.all && !window.opera? this.standardbody.scrollTop : window.pageYOffset
         var windowedge=document.all && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18
         var dropmenuH=this.dropmenuobj._trueheight
         if (windowedge-this.dropmenuobj.y < dropmenuH){ //move up?
            edgeoffset=dropmenuH+obj.offsetHeight
            if ((this.dropmenuobj.y-topedge)<dropmenuH) //up no good either?
               edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge
         }
      }
      return edgeoffset
   },

   dropit:function(obj, e, dropmenuID){
      if (this.dropmenuobj!=null) //hide previous menu
         this.hidemenu() //hide menu
      this.clearhidemenu()
      this.dropmenuobj=document.getElementById(dropmenuID) //reference drop down menu
      this.asscmenuitem=obj //reference associated menu item
      this.showmenu(this.dropmenuobj, e)
      this.dropmenuobj.x=this.getposOffset(obj, "left")
      this.dropmenuobj.y=this.getposOffset(obj, "top")
      this.dropmenuobj.style.left=this.dropmenuobj.x-this.clearbrowseredge(obj, "rightedge")+"px"
      this.dropmenuobj.style.top=this.dropmenuobj.y-this.clearbrowseredge(obj, "bottomedge")+obj.offsetHeight+1+"px"
      this.positionshim() //call iframe shim function
   },

   positionshim:function(){ //display iframe shim function
      if (this.iframeshimadded){
         if (this.dropmenuobj.style.visibility=="visible"){
            this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
            this.shimobject.style.height=this.dropmenuobj._trueheight+"px"
            this.shimobject.style.left=parseInt(this.dropmenuobj.style.left)+"px"
            this.shimobject.style.top=parseInt(this.dropmenuobj.style.top)+"px"
            this.shimobject.style.display="block"
         }
      }
   },

   hideshim:function(){
      if (this.iframeshimadded)
         this.shimobject.style.display='none'
   },

   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
   },

   dynamichide:function(m, e){
      if (!this.isContained(m, e)){
         this.delayhidemenu()
      }
   },

   delayhidemenu:function(){
      this.delayhide=setTimeout("cssdropdown.hidemenu()", this.disappeardelay) //hide menu
   },

   hidemenu:function(){
      this.css(this.asscmenuitem, "selected", "remove")
      this.dropmenuobj.style.visibility='hidden'
      this.dropmenuobj.style.left=this.dropmenuobj.style.top="-1000px"
      this.hideshim()
   },

   clearhidemenu:function(){
      if (this.delayhide!="undefined")
         clearTimeout(this.delayhide)
   },

   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)
            });
   },

   startchrome:function(){
      if (!this.domsupport)
         return
      this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
      for (var ids=0; ids<arguments.length; ids++){
         var menuitems=document.getElementById(arguments[ids]).getElementsByTagName("a")
         for (var i=0; i<menuitems.length; i++){
            if (menuitems[i].getAttribute("rel")){
               var relvalue=menuitems[i].getAttribute("rel")
               var asscdropdownmenu=document.getElementById(relvalue)
               this.addEvent(asscdropdownmenu, function(){
                  cssdropdown.clearhidemenu()
                  }, "mouseover")
               this.addEvent(asscdropdownmenu, function(e){
                  cssdropdown.dynamichide(this, e)
                  }, "mouseout")
               this.addEvent(asscdropdownmenu, function(){
                  cssdropdown.delayhidemenu()
                  }, "click")
               try{
                  menuitems[i].innerHTML=menuitems[i].innerHTML+this.dropdownindicator
               }catch(e){}
               this.addEvent(menuitems[i], function(e){ //show drop down menu when main menu items are mouse over-ed
                  if (!cssdropdown.isContained(this, e)){
                     var evtobj=window.event || e
                     cssdropdown.dropit(this, evtobj, this.getAttribute("rel"))
                  }
               }, "mouseover")
               this.addEvent(menuitems[i], function(e){
                  cssdropdown.dynamichide(this, e)
                  }, "mouseout") //hide drop down menu when main menu items are mouse out
               this.addEvent(menuitems[i], function(){
                  cssdropdown.delayhidemenu()
                  }, "click") //hide drop down menu when main menu items are clicked on
            }
         } //end inner for
      } //end outer for
      if (this.enableiframeshim && document.all && !window.XDomainRequest && !this.iframeshimadded){ //enable iframe shim in IE5.5 thru IE7?
         document.write('<IFRAME id="iframeshim" src="about:blank" frameBorder="0" scrolling="no" style="left:0; top:0; position:absolute; display:none;z-index:90; background: transparent;"></IFRAME>')
         this.shimobject=document.getElementById("iframeshim") //reference iframe object
         this.shimobject.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
         this.iframeshimadded=true
      }
   } //end startchrome

}