//Chrome Drop Down Menu v2.01- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: November 14th 06- added iframe shim technique

var cssdropdown = {
   disappeardelay: 100, //set delay in miliseconds before menu disappears onmouseout
   disablemenuclick: true, //when user clicks on a menu item with a drop down menu, disable menu item's link?
   enableswipe: 1, //enable swipe effect? 1 for yes, 0 for no
   enableiframeshim: 1, //enable "iframe shim" technique to get drop down menus to correctly appear on top of controls such as form objects in IE5.5/IE6? 1 for yes, 0 for no

   //No need to edit beyond here////////////////////////
   dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, swipetimer: undefined, bottomclip:0,

   getposOffset:function(what, offsettype) {
      var totaloffset=(offsettype=="left")? what.offsetLeft : what.offsetTop;
      var parentEl=what.offsetParent;
      while (parentEl!=null) {
         totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
         parentEl=parentEl.offsetParent;
      }
      return totaloffset;
   },

   swipeeffect:function() {
      if (this.bottomclip<parseInt(this.dropmenuobj.offsetHeight)) {
         this.bottomclip+=10+(this.bottomclip/10) //unclip drop down menu visibility gradually
         this.dropmenuobj.style.clip="rect(0 auto "+this.bottomclip+"px 0)"
      }
      else
         return
      this.swipetimer=setTimeout("cssdropdown.swipeeffect()", 10)
   },

   showhide:function(obj, e) {
   if (this.ie || this.firefox)
      this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
   if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover") {
      if (this.enableswipe==1) {
         if (typeof this.swipetimer!="undefined")
            clearTimeout(this.swipetimer)
            obj.clip="rect(0 auto 0 0)" //hide menu via clipping
            this.bottomclip=0
            this.swipeeffect()
         }
         obj.visibility="visible"
      }
      else if (e.type=="click")
         obj.visibility="hidden"
   },

   iecompattest:function() {
      return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
   },

   clearbrowseredge:function(obj, whichedge) {
      var edgeoffset=0
      if (whichedge=="rightedge") {
         var windowedge=this.ie && !window.opera? this.iecompattest().scrollLeft+this.iecompattest().clientWidth-15 : window.pageXOffset+window.innerWidth-15
         this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetWidth
         if (windowedge-this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
            edgeoffset=this.dropmenuobj.contentmeasure-obj.offsetWidth
      }
      else {
         var topedge=this.ie && !window.opera? this.iecompattest().scrollTop : window.pageYOffset
         var windowedge=this.ie && !window.opera? this.iecompattest().scrollTop+this.iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
         this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight
         if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure) { //move up?
            edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
            if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //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.dropmenuobj.style.visibility="hidden" //hide menu
      this.clearhidemenu()
      if (this.ie||this.firefox) {
         obj.onmouseout=function(){cssdropdown.delayhidemenu()}
         obj.onclick=function(){return !cssdropdown.disablemenuclick} //disable main menu item link onclick?
         this.dropmenuobj=document.getElementById(dropmenuID)
         this.dropmenuobj.onmouseover=function(){cssdropdown.clearhidemenu()}
         this.dropmenuobj.onmouseout=function(e){cssdropdown.dynamichide(e)}
         this.dropmenuobj.onclick=function(){cssdropdown.delayhidemenu()}
         this.showhide(this.dropmenuobj.style, 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.enableiframeshim && typeof this.shimobject!="undefined") {
         if (this.dropmenuobj.style.visibility=="visible") {
            this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
            this.shimobject.style.height=this.dropmenuobj.offsetHeight+"px"
            this.shimobject.style.left=this.dropmenuobj.style.left
            this.shimobject.style.top=this.dropmenuobj.style.top
         }
         this.shimobject.style.display=(this.dropmenuobj.style.visibility=="visible")? "block" : "none"
      }
   },

   hideshim:function(){
      if (this.enableiframeshim && typeof this.shimobject!="undefined")
         this.shimobject.style.display='none'
   },

   contains_firefox:function(a, b) {
      while (b.parentNode)
         if ((b = b.parentNode) == a)
            return true;
         return false;
   },

   dynamichide:function(e) {
      var evtobj=window.event? window.event : e
      if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
         this.delayhidemenu()
      else if (this.firefox&&e.currentTarget!= evtobj.relatedTarget&& !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
         this.delayhidemenu()
   },

   delayhidemenu:function(){
      this.delayhide=setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'; cssdropdown.hideshim()",this.disappeardelay) //hide menu
   },

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

   startchrome:function(){
      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")
               menuitems[i].onmouseover=function(e) {
                  var event=typeof e!="undefined"? e : window.event
                  cssdropdown.dropit(this,event,this.getAttribute("rel"))
               }
            }
         }
      }
      if (window.createPopup && !window.XmlHttpRequest){  //if IE5.5 to IE6, create iframe for iframe shim technique
         document.write('<IFRAME id="iframeshim"  src="" style="display: none; left: 0; top: 0; z-index: 90; position: absolute; filter: progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)" frameBorder="0" scrolling="no"></IFRAME>')
         this.shimobject=document.getElementById("iframeshim") //reference iframe object
      }
   }

}